判断字符串全为数字

1 判断字符串全为数字

　　1.1 直接调用 isNumeric 方法

　　　　1.1.1 引入commons依赖包

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.6</version>
        </dependency>

　　　  1.1.2 通过  StringUtils类 调用 isNumeric方法

　　　　技巧01：StringUtils对应的包为 -> import org.apache.commons.lang3.StringUtils;

StringUtils.isNumeric(string)

　　　　1.1.3 StringUtils源码

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package org.apache.commons.lang3;

import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.text.Normalizer;
import java.text.Normalizer.Form;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.regex.Pattern;

public class StringUtils {
    public static final String SPACE = " ";
    public static final String EMPTY = "";
    public static final String LF = "\n";
    public static final String CR = "\r";
    public static final int INDEX_NOT_FOUND = -1;
    private static final int PAD_LIMIT = 8192;

    public StringUtils() {
    }

    public static boolean isEmpty(CharSequence cs) {
        return cs == null || cs.length() == 0;
    }

    public static boolean isNotEmpty(CharSequence cs) {
        return !isEmpty(cs);
    }

    public static boolean isAnyEmpty(CharSequence... css) {
        if (ArrayUtils.isEmpty(css)) {
            return false;
        } else {
            CharSequence[] var1 = css;
            int var2 = css.length;

            for(int var3 = 0; var3 < var2; ++var3) {
                CharSequence cs = var1[var3];
                if (isEmpty(cs)) {
                    return true;
                }
            }

            return false;
        }
    }

    public static boolean isNoneEmpty(CharSequence... css) {
        return !isAnyEmpty(css);
    }

    public static boolean isAllEmpty(CharSequence... css) {
        if (ArrayUtils.isEmpty(css)) {
            return true;
        } else {
            CharSequence[] var1 = css;
            int var2 = css.length;

            for(int var3 = 0; var3 < var2; ++var3) {
                CharSequence cs = var1[var3];
                if (isNotEmpty(cs)) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isBlank(CharSequence cs) {
        int strLen;
        if (cs != null && (strLen = cs.length()) != 0) {
            for(int i = 0; i < strLen; ++i) {
                if (!Character.isWhitespace(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        } else {
            return true;
        }
    }

    public static boolean isNotBlank(CharSequence cs) {
        return !isBlank(cs);
    }

    public static boolean isAnyBlank(CharSequence... css) {
        if (ArrayUtils.isEmpty(css)) {
            return false;
        } else {
            CharSequence[] var1 = css;
            int var2 = css.length;

            for(int var3 = 0; var3 < var2; ++var3) {
                CharSequence cs = var1[var3];
                if (isBlank(cs)) {
                    return true;
                }
            }

            return false;
        }
    }

    public static boolean isNoneBlank(CharSequence... css) {
        return !isAnyBlank(css);
    }

    public static boolean isAllBlank(CharSequence... css) {
        if (ArrayUtils.isEmpty(css)) {
            return true;
        } else {
            CharSequence[] var1 = css;
            int var2 = css.length;

            for(int var3 = 0; var3 < var2; ++var3) {
                CharSequence cs = var1[var3];
                if (isNotBlank(cs)) {
                    return false;
                }
            }

            return true;
        }
    }

    public static String trim(String str) {
        return str == null ? null : str.trim();
    }

    public static String trimToNull(String str) {
        String ts = trim(str);
        return isEmpty(ts) ? null : ts;
    }

    public static String trimToEmpty(String str) {
        return str == null ? "" : str.trim();
    }

    public static String truncate(String str, int maxWidth) {
        return truncate(str, 0, maxWidth);
    }

    public static String truncate(String str, int offset, int maxWidth) {
        if (offset < 0) {
            throw new IllegalArgumentException("offset cannot be negative");
        } else if (maxWidth < 0) {
            throw new IllegalArgumentException("maxWith cannot be negative");
        } else if (str == null) {
            return null;
        } else if (offset > str.length()) {
            return "";
        } else if (str.length() > maxWidth) {
            int ix = offset + maxWidth > str.length() ? str.length() : offset + maxWidth;
            return str.substring(offset, ix);
        } else {
            return str.substring(offset);
        }
    }

    public static String strip(String str) {
        return strip(str, (String)null);
    }

    public static String stripToNull(String str) {
        if (str == null) {
            return null;
        } else {
            str = strip(str, (String)null);
            return str.isEmpty() ? null : str;
        }
    }

    public static String stripToEmpty(String str) {
        return str == null ? "" : strip(str, (String)null);
    }

    public static String strip(String str, String stripChars) {
        if (isEmpty(str)) {
            return str;
        } else {
            str = stripStart(str, stripChars);
            return stripEnd(str, stripChars);
        }
    }

    public static String stripStart(String str, String stripChars) {
        int strLen;
        if (str != null && (strLen = str.length()) != 0) {
            int start = 0;
            if (stripChars == null) {
                while(start != strLen && Character.isWhitespace(str.charAt(start))) {
                    ++start;
                }
            } else {
                if (stripChars.isEmpty()) {
                    return str;
                }

                while(start != strLen && stripChars.indexOf(str.charAt(start)) != -1) {
                    ++start;
                }
            }

            return str.substring(start);
        } else {
            return str;
        }
    }

    public static String stripEnd(String str, String stripChars) {
        int end;
        if (str != null && (end = str.length()) != 0) {
            if (stripChars == null) {
                while(end != 0 && Character.isWhitespace(str.charAt(end - 1))) {
                    --end;
                }
            } else {
                if (stripChars.isEmpty()) {
                    return str;
                }

                while(end != 0 && stripChars.indexOf(str.charAt(end - 1)) != -1) {
                    --end;
                }
            }

            return str.substring(0, end);
        } else {
            return str;
        }
    }

    public static String[] stripAll(String... strs) {
        return stripAll(strs, (String)null);
    }

    public static String[] stripAll(String[] strs, String stripChars) {
        int strsLen;
        if (strs != null && (strsLen = strs.length) != 0) {
            String[] newArr = new String[strsLen];

            for(int i = 0; i < strsLen; ++i) {
                newArr[i] = strip(strs[i], stripChars);
            }

            return newArr;
        } else {
            return strs;
        }
    }

    public static String stripAccents(String input) {
        if (input == null) {
            return null;
        } else {
            Pattern pattern = Pattern.compile("\\p{InCombiningDiacriticalMarks}+");
            StringBuilder decomposed = new StringBuilder(Normalizer.normalize(input, Form.NFD));
            convertRemainingAccentCharacters(decomposed);
            return pattern.matcher(decomposed).replaceAll("");
        }
    }

    private static void convertRemainingAccentCharacters(StringBuilder decomposed) {
        for(int i = 0; i < decomposed.length(); ++i) {
            if (decomposed.charAt(i) == 321) {
                decomposed.deleteCharAt(i);
                decomposed.insert(i, 'L');
            } else if (decomposed.charAt(i) == 322) {
                decomposed.deleteCharAt(i);
                decomposed.insert(i, 'l');
            }
        }

    }

    public static boolean equals(CharSequence cs1, CharSequence cs2) {
        if (cs1 == cs2) {
            return true;
        } else if (cs1 != null && cs2 != null) {
            if (cs1.length() != cs2.length()) {
                return false;
            } else {
                return cs1 instanceof String && cs2 instanceof String ? cs1.equals(cs2) : CharSequenceUtils.regionMatches(cs1, false, 0, cs2, 0, cs1.length());
            }
        } else {
            return false;
        }
    }

    public static boolean equalsIgnoreCase(CharSequence str1, CharSequence str2) {
        if (str1 != null && str2 != null) {
            if (str1 == str2) {
                return true;
            } else {
                return str1.length() != str2.length() ? false : CharSequenceUtils.regionMatches(str1, true, 0, str2, 0, str1.length());
            }
        } else {
            return str1 == str2;
        }
    }

    public static int compare(String str1, String str2) {
        return compare(str1, str2, true);
    }

    public static int compare(String str1, String str2, boolean nullIsLess) {
        if (str1 == str2) {
            return 0;
        } else if (str1 == null) {
            return nullIsLess ? -1 : 1;
        } else if (str2 == null) {
            return nullIsLess ? 1 : -1;
        } else {
            return str1.compareTo(str2);
        }
    }

    public static int compareIgnoreCase(String str1, String str2) {
        return compareIgnoreCase(str1, str2, true);
    }

    public static int compareIgnoreCase(String str1, String str2, boolean nullIsLess) {
        if (str1 == str2) {
            return 0;
        } else if (str1 == null) {
            return nullIsLess ? -1 : 1;
        } else if (str2 == null) {
            return nullIsLess ? 1 : -1;
        } else {
            return str1.compareToIgnoreCase(str2);
        }
    }

    public static boolean equalsAny(CharSequence string, CharSequence... searchStrings) {
        if (ArrayUtils.isNotEmpty(searchStrings)) {
            CharSequence[] var2 = searchStrings;
            int var3 = searchStrings.length;

            for(int var4 = 0; var4 < var3; ++var4) {
                CharSequence next = var2[var4];
                if (equals(string, next)) {
                    return true;
                }
            }
        }

        return false;
    }

    public static boolean equalsAnyIgnoreCase(CharSequence string, CharSequence... searchStrings) {
        if (ArrayUtils.isNotEmpty(searchStrings)) {
            CharSequence[] var2 = searchStrings;
            int var3 = searchStrings.length;

            for(int var4 = 0; var4 < var3; ++var4) {
                CharSequence next = var2[var4];
                if (equalsIgnoreCase(string, next)) {
                    return true;
                }
            }
        }

        return false;
    }

    public static int indexOf(CharSequence seq, int searchChar) {
        return isEmpty(seq) ? -1 : CharSequenceUtils.indexOf(seq, searchChar, 0);
    }

    public static int indexOf(CharSequence seq, int searchChar, int startPos) {
        return isEmpty(seq) ? -1 : CharSequenceUtils.indexOf(seq, searchChar, startPos);
    }

    public static int indexOf(CharSequence seq, CharSequence searchSeq) {
        return seq != null && searchSeq != null ? CharSequenceUtils.indexOf(seq, searchSeq, 0) : -1;
    }

    public static int indexOf(CharSequence seq, CharSequence searchSeq, int startPos) {
        return seq != null && searchSeq != null ? CharSequenceUtils.indexOf(seq, searchSeq, startPos) : -1;
    }

    public static int ordinalIndexOf(CharSequence str, CharSequence searchStr, int ordinal) {
        return ordinalIndexOf(str, searchStr, ordinal, false);
    }

    private static int ordinalIndexOf(CharSequence str, CharSequence searchStr, int ordinal, boolean lastIndex) {
        if (str != null && searchStr != null && ordinal > 0) {
            if (searchStr.length() == 0) {
                return lastIndex ? str.length() : 0;
            } else {
                int found = 0;
                int index = lastIndex ? str.length() : -1;

                do {
                    if (lastIndex) {
                        index = CharSequenceUtils.lastIndexOf(str, searchStr, index - 1);
                    } else {
                        index = CharSequenceUtils.indexOf(str, searchStr, index + 1);
                    }

                    if (index < 0) {
                        return index;
                    }

                    ++found;
                } while(found < ordinal);

                return index;
            }
        } else {
            return -1;
        }
    }

    public static int indexOfIgnoreCase(CharSequence str, CharSequence searchStr) {
        return indexOfIgnoreCase(str, searchStr, 0);
    }

    public static int indexOfIgnoreCase(CharSequence str, CharSequence searchStr, int startPos) {
        if (str != null && searchStr != null) {
            if (startPos < 0) {
                startPos = 0;
            }

            int endLimit = str.length() - searchStr.length() + 1;
            if (startPos > endLimit) {
                return -1;
            } else if (searchStr.length() == 0) {
                return startPos;
            } else {
                for(int i = startPos; i < endLimit; ++i) {
                    if (CharSequenceUtils.regionMatches(str, true, i, searchStr, 0, searchStr.length())) {
                        return i;
                    }
                }

                return -1;
            }
        } else {
            return -1;
        }
    }

    public static int lastIndexOf(CharSequence seq, int searchChar) {
        return isEmpty(seq) ? -1 : CharSequenceUtils.lastIndexOf(seq, searchChar, seq.length());
    }

    public static int lastIndexOf(CharSequence seq, int searchChar, int startPos) {
        return isEmpty(seq) ? -1 : CharSequenceUtils.lastIndexOf(seq, searchChar, startPos);
    }

    public static int lastIndexOf(CharSequence seq, CharSequence searchSeq) {
        return seq != null && searchSeq != null ? CharSequenceUtils.lastIndexOf(seq, searchSeq, seq.length()) : -1;
    }

    public static int lastOrdinalIndexOf(CharSequence str, CharSequence searchStr, int ordinal) {
        return ordinalIndexOf(str, searchStr, ordinal, true);
    }

    public static int lastIndexOf(CharSequence seq, CharSequence searchSeq, int startPos) {
        return seq != null && searchSeq != null ? CharSequenceUtils.lastIndexOf(seq, searchSeq, startPos) : -1;
    }

    public static int lastIndexOfIgnoreCase(CharSequence str, CharSequence searchStr) {
        return str != null && searchStr != null ? lastIndexOfIgnoreCase(str, searchStr, str.length()) : -1;
    }

    public static int lastIndexOfIgnoreCase(CharSequence str, CharSequence searchStr, int startPos) {
        if (str != null && searchStr != null) {
            if (startPos > str.length() - searchStr.length()) {
                startPos = str.length() - searchStr.length();
            }

            if (startPos < 0) {
                return -1;
            } else if (searchStr.length() == 0) {
                return startPos;
            } else {
                for(int i = startPos; i >= 0; --i) {
                    if (CharSequenceUtils.regionMatches(str, true, i, searchStr, 0, searchStr.length())) {
                        return i;
                    }
                }

                return -1;
            }
        } else {
            return -1;
        }
    }

    public static boolean contains(CharSequence seq, int searchChar) {
        if (isEmpty(seq)) {
            return false;
        } else {
            return CharSequenceUtils.indexOf(seq, searchChar, 0) >= 0;
        }
    }

    public static boolean contains(CharSequence seq, CharSequence searchSeq) {
        if (seq != null && searchSeq != null) {
            return CharSequenceUtils.indexOf(seq, searchSeq, 0) >= 0;
        } else {
            return false;
        }
    }

    public static boolean containsIgnoreCase(CharSequence str, CharSequence searchStr) {
        if (str != null && searchStr != null) {
            int len = searchStr.length();
            int max = str.length() - len;

            for(int i = 0; i <= max; ++i) {
                if (CharSequenceUtils.regionMatches(str, true, i, searchStr, 0, len)) {
                    return true;
                }
            }

            return false;
        } else {
            return false;
        }
    }

    public static boolean containsWhitespace(CharSequence seq) {
        if (isEmpty(seq)) {
            return false;
        } else {
            int strLen = seq.length();

            for(int i = 0; i < strLen; ++i) {
                if (Character.isWhitespace(seq.charAt(i))) {
                    return true;
                }
            }

            return false;
        }
    }

    public static int indexOfAny(CharSequence cs, char... searchChars) {
        if (!isEmpty(cs) && !ArrayUtils.isEmpty(searchChars)) {
            int csLen = cs.length();
            int csLast = csLen - 1;
            int searchLen = searchChars.length;
            int searchLast = searchLen - 1;

            for(int i = 0; i < csLen; ++i) {
                char ch = cs.charAt(i);

                for(int j = 0; j < searchLen; ++j) {
                    if (searchChars[j] == ch) {
                        if (i >= csLast || j >= searchLast || !Character.isHighSurrogate(ch)) {
                            return i;
                        }

                        if (searchChars[j + 1] == cs.charAt(i + 1)) {
                            return i;
                        }
                    }
                }
            }

            return -1;
        } else {
            return -1;
        }
    }

    public static int indexOfAny(CharSequence cs, String searchChars) {
        return !isEmpty(cs) && !isEmpty(searchChars) ? indexOfAny(cs, searchChars.toCharArray()) : -1;
    }

    public static boolean containsAny(CharSequence cs, char... searchChars) {
        if (!isEmpty(cs) && !ArrayUtils.isEmpty(searchChars)) {
            int csLength = cs.length();
            int searchLength = searchChars.length;
            int csLast = csLength - 1;
            int searchLast = searchLength - 1;

            for(int i = 0; i < csLength; ++i) {
                char ch = cs.charAt(i);

                for(int j = 0; j < searchLength; ++j) {
                    if (searchChars[j] == ch) {
                        if (!Character.isHighSurrogate(ch)) {
                            return true;
                        }

                        if (j == searchLast) {
                            return true;
                        }

                        if (i < csLast && searchChars[j + 1] == cs.charAt(i + 1)) {
                            return true;
                        }
                    }
                }
            }

            return false;
        } else {
            return false;
        }
    }

    public static boolean containsAny(CharSequence cs, CharSequence searchChars) {
        return searchChars == null ? false : containsAny(cs, CharSequenceUtils.toCharArray(searchChars));
    }

    public static boolean containsAny(CharSequence cs, CharSequence... searchCharSequences) {
        if (!isEmpty(cs) && !ArrayUtils.isEmpty(searchCharSequences)) {
            CharSequence[] var2 = searchCharSequences;
            int var3 = searchCharSequences.length;

            for(int var4 = 0; var4 < var3; ++var4) {
                CharSequence searchCharSequence = var2[var4];
                if (contains(cs, searchCharSequence)) {
                    return true;
                }
            }

            return false;
        } else {
            return false;
        }
    }

    public static int indexOfAnyBut(CharSequence cs, char... searchChars) {
        if (!isEmpty(cs) && !ArrayUtils.isEmpty(searchChars)) {
            int csLen = cs.length();
            int csLast = csLen - 1;
            int searchLen = searchChars.length;
            int searchLast = searchLen - 1;

            label38:
            for(int i = 0; i < csLen; ++i) {
                char ch = cs.charAt(i);

                for(int j = 0; j < searchLen; ++j) {
                    if (searchChars[j] == ch && (i >= csLast || j >= searchLast || !Character.isHighSurrogate(ch) || searchChars[j + 1] == cs.charAt(i + 1))) {
                        continue label38;
                    }
                }

                return i;
            }

            return -1;
        } else {
            return -1;
        }
    }

    public static int indexOfAnyBut(CharSequence seq, CharSequence searchChars) {
        if (!isEmpty(seq) && !isEmpty(searchChars)) {
            int strLen = seq.length();

            for(int i = 0; i < strLen; ++i) {
                char ch = seq.charAt(i);
                boolean chFound = CharSequenceUtils.indexOf(searchChars, ch, 0) >= 0;
                if (i + 1 < strLen && Character.isHighSurrogate(ch)) {
                    char ch2 = seq.charAt(i + 1);
                    if (chFound && CharSequenceUtils.indexOf(searchChars, ch2, 0) < 0) {
                        return i;
                    }
                } else if (!chFound) {
                    return i;
                }
            }

            return -1;
        } else {
            return -1;
        }
    }

    public static boolean containsOnly(CharSequence cs, char... valid) {
        if (valid != null && cs != null) {
            if (cs.length() == 0) {
                return true;
            } else if (valid.length == 0) {
                return false;
            } else {
                return indexOfAnyBut(cs, valid) == -1;
            }
        } else {
            return false;
        }
    }

    public static boolean containsOnly(CharSequence cs, String validChars) {
        return cs != null && validChars != null ? containsOnly(cs, validChars.toCharArray()) : false;
    }

    public static boolean containsNone(CharSequence cs, char... searchChars) {
        if (cs != null && searchChars != null) {
            int csLen = cs.length();
            int csLast = csLen - 1;
            int searchLen = searchChars.length;
            int searchLast = searchLen - 1;

            for(int i = 0; i < csLen; ++i) {
                char ch = cs.charAt(i);

                for(int j = 0; j < searchLen; ++j) {
                    if (searchChars[j] == ch) {
                        if (!Character.isHighSurrogate(ch)) {
                            return false;
                        }

                        if (j == searchLast) {
                            return false;
                        }

                        if (i < csLast && searchChars[j + 1] == cs.charAt(i + 1)) {
                            return false;
                        }
                    }
                }
            }

            return true;
        } else {
            return true;
        }
    }

    public static boolean containsNone(CharSequence cs, String invalidChars) {
        return cs != null && invalidChars != null ? containsNone(cs, invalidChars.toCharArray()) : true;
    }

    public static int indexOfAny(CharSequence str, CharSequence... searchStrs) {
        if (str != null && searchStrs != null) {
            int ret = 2147483647;
            int tmp = false;
            CharSequence[] var4 = searchStrs;
            int var5 = searchStrs.length;

            for(int var6 = 0; var6 < var5; ++var6) {
                CharSequence search = var4[var6];
                if (search != null) {
                    int tmp = CharSequenceUtils.indexOf(str, search, 0);
                    if (tmp != -1 && tmp < ret) {
                        ret = tmp;
                    }
                }
            }

            return ret == 2147483647 ? -1 : ret;
        } else {
            return -1;
        }
    }

    public static int lastIndexOfAny(CharSequence str, CharSequence... searchStrs) {
        if (str != null && searchStrs != null) {
            int ret = -1;
            int tmp = false;
            CharSequence[] var4 = searchStrs;
            int var5 = searchStrs.length;

            for(int var6 = 0; var6 < var5; ++var6) {
                CharSequence search = var4[var6];
                if (search != null) {
                    int tmp = CharSequenceUtils.lastIndexOf(str, search, str.length());
                    if (tmp > ret) {
                        ret = tmp;
                    }
                }
            }

            return ret;
        } else {
            return -1;
        }
    }

    public static String substring(String str, int start) {
        if (str == null) {
            return null;
        } else {
            if (start < 0) {
                start += str.length();
            }

            if (start < 0) {
                start = 0;
            }

            return start > str.length() ? "" : str.substring(start);
        }
    }

    public static String substring(String str, int start, int end) {
        if (str == null) {
            return null;
        } else {
            if (end < 0) {
                end += str.length();
            }

            if (start < 0) {
                start += str.length();
            }

            if (end > str.length()) {
                end = str.length();
            }

            if (start > end) {
                return "";
            } else {
                if (start < 0) {
                    start = 0;
                }

                if (end < 0) {
                    end = 0;
                }

                return str.substring(start, end);
            }
        }
    }

    public static String left(String str, int len) {
        if (str == null) {
            return null;
        } else if (len < 0) {
            return "";
        } else {
            return str.length() <= len ? str : str.substring(0, len);
        }
    }

    public static String right(String str, int len) {
        if (str == null) {
            return null;
        } else if (len < 0) {
            return "";
        } else {
            return str.length() <= len ? str : str.substring(str.length() - len);
        }
    }

    public static String mid(String str, int pos, int len) {
        if (str == null) {
            return null;
        } else if (len >= 0 && pos <= str.length()) {
            if (pos < 0) {
                pos = 0;
            }

            return str.length() <= pos + len ? str.substring(pos) : str.substring(pos, pos + len);
        } else {
            return "";
        }
    }

    public static String substringBefore(String str, String separator) {
        if (!isEmpty(str) && separator != null) {
            if (separator.isEmpty()) {
                return "";
            } else {
                int pos = str.indexOf(separator);
                return pos == -1 ? str : str.substring(0, pos);
            }
        } else {
            return str;
        }
    }

    public static String substringAfter(String str, String separator) {
        if (isEmpty(str)) {
            return str;
        } else if (separator == null) {
            return "";
        } else {
            int pos = str.indexOf(separator);
            return pos == -1 ? "" : str.substring(pos + separator.length());
        }
    }

    public static String substringBeforeLast(String str, String separator) {
        if (!isEmpty(str) && !isEmpty(separator)) {
            int pos = str.lastIndexOf(separator);
            return pos == -1 ? str : str.substring(0, pos);
        } else {
            return str;
        }
    }

    public static String substringAfterLast(String str, String separator) {
        if (isEmpty(str)) {
            return str;
        } else if (isEmpty(separator)) {
            return "";
        } else {
            int pos = str.lastIndexOf(separator);
            return pos != -1 && pos != str.length() - separator.length() ? str.substring(pos + separator.length()) : "";
        }
    }

    public static String substringBetween(String str, String tag) {
        return substringBetween(str, tag, tag);
    }

    public static String substringBetween(String str, String open, String close) {
        if (str != null && open != null && close != null) {
            int start = str.indexOf(open);
            if (start != -1) {
                int end = str.indexOf(close, start + open.length());
                if (end != -1) {
                    return str.substring(start + open.length(), end);
                }
            }

            return null;
        } else {
            return null;
        }
    }

    public static String[] substringsBetween(String str, String open, String close) {
        if (str != null && !isEmpty(open) && !isEmpty(close)) {
            int strLen = str.length();
            if (strLen == 0) {
                return ArrayUtils.EMPTY_STRING_ARRAY;
            } else {
                int closeLen = close.length();
                int openLen = open.length();
                List<String> list = new ArrayList();

                int end;
                for(int pos = 0; pos < strLen - closeLen; pos = end + closeLen) {
                    int start = str.indexOf(open, pos);
                    if (start < 0) {
                        break;
                    }

                    start += openLen;
                    end = str.indexOf(close, start);
                    if (end < 0) {
                        break;
                    }

                    list.add(str.substring(start, end));
                }

                return list.isEmpty() ? null : (String[])list.toArray(new String[list.size()]);
            }
        } else {
            return null;
        }
    }

    public static String[] split(String str) {
        return split(str, (String)null, -1);
    }

    public static String[] split(String str, char separatorChar) {
        return splitWorker(str, separatorChar, false);
    }

    public static String[] split(String str, String separatorChars) {
        return splitWorker(str, separatorChars, -1, false);
    }

    public static String[] split(String str, String separatorChars, int max) {
        return splitWorker(str, separatorChars, max, false);
    }

    public static String[] splitByWholeSeparator(String str, String separator) {
        return splitByWholeSeparatorWorker(str, separator, -1, false);
    }

    public static String[] splitByWholeSeparator(String str, String separator, int max) {
        return splitByWholeSeparatorWorker(str, separator, max, false);
    }

    public static String[] splitByWholeSeparatorPreserveAllTokens(String str, String separator) {
        return splitByWholeSeparatorWorker(str, separator, -1, true);
    }

    public static String[] splitByWholeSeparatorPreserveAllTokens(String str, String separator, int max) {
        return splitByWholeSeparatorWorker(str, separator, max, true);
    }

    private static String[] splitByWholeSeparatorWorker(String str, String separator, int max, boolean preserveAllTokens) {
        if (str == null) {
            return null;
        } else {
            int len = str.length();
            if (len == 0) {
                return ArrayUtils.EMPTY_STRING_ARRAY;
            } else if (separator != null && !"".equals(separator)) {
                int separatorLength = separator.length();
                ArrayList<String> substrings = new ArrayList();
                int numberOfSubstrings = 0;
                int beg = 0;
                int end = 0;

                while(end < len) {
                    end = str.indexOf(separator, beg);
                    if (end > -1) {
                        if (end > beg) {
                            ++numberOfSubstrings;
                            if (numberOfSubstrings == max) {
                                end = len;
                                substrings.add(str.substring(beg));
                            } else {
                                substrings.add(str.substring(beg, end));
                                beg = end + separatorLength;
                            }
                        } else {
                            if (preserveAllTokens) {
                                ++numberOfSubstrings;
                                if (numberOfSubstrings == max) {
                                    end = len;
                                    substrings.add(str.substring(beg));
                                } else {
                                    substrings.add("");
                                }
                            }

                            beg = end + separatorLength;
                        }
                    } else {
                        substrings.add(str.substring(beg));
                        end = len;
                    }
                }

                return (String[])substrings.toArray(new String[substrings.size()]);
            } else {
                return splitWorker(str, (String)null, max, preserveAllTokens);
            }
        }
    }

    public static String[] splitPreserveAllTokens(String str) {
        return splitWorker(str, (String)null, -1, true);
    }

    public static String[] splitPreserveAllTokens(String str, char separatorChar) {
        return splitWorker(str, separatorChar, true);
    }

    private static String[] splitWorker(String str, char separatorChar, boolean preserveAllTokens) {
        if (str == null) {
            return null;
        } else {
            int len = str.length();
            if (len == 0) {
                return ArrayUtils.EMPTY_STRING_ARRAY;
            } else {
                List<String> list = new ArrayList();
                int i = 0;
                int start = 0;
                boolean match = false;
                boolean lastMatch = false;

                while(true) {
                    while(i < len) {
                        if (str.charAt(i) == separatorChar) {
                            if (match || preserveAllTokens) {
                                list.add(str.substring(start, i));
                                match = false;
                                lastMatch = true;
                            }

                            ++i;
                            start = i;
                        } else {
                            lastMatch = false;
                            match = true;
                            ++i;
                        }
                    }

                    if (match || preserveAllTokens && lastMatch) {
                        list.add(str.substring(start, i));
                    }

                    return (String[])list.toArray(new String[list.size()]);
                }
            }
        }
    }

    public static String[] splitPreserveAllTokens(String str, String separatorChars) {
        return splitWorker(str, separatorChars, -1, true);
    }

    public static String[] splitPreserveAllTokens(String str, String separatorChars, int max) {
        return splitWorker(str, separatorChars, max, true);
    }

    private static String[] splitWorker(String str, String separatorChars, int max, boolean preserveAllTokens) {
        if (str == null) {
            return null;
        } else {
            int len = str.length();
            if (len == 0) {
                return ArrayUtils.EMPTY_STRING_ARRAY;
            } else {
                List<String> list = new ArrayList();
                int sizePlus1 = 1;
                int i = 0;
                int start = 0;
                boolean match = false;
                boolean lastMatch = false;
                if (separatorChars != null) {
                    if (separatorChars.length() != 1) {
                        label87:
                        while(true) {
                            while(true) {
                                if (i >= len) {
                                    break label87;
                                }

                                if (separatorChars.indexOf(str.charAt(i)) >= 0) {
                                    if (match || preserveAllTokens) {
                                        lastMatch = true;
                                        if (sizePlus1++ == max) {
                                            i = len;
                                            lastMatch = false;
                                        }

                                        list.add(str.substring(start, i));
                                        match = false;
                                    }

                                    ++i;
                                    start = i;
                                } else {
                                    lastMatch = false;
                                    match = true;
                                    ++i;
                                }
                            }
                        }
                    } else {
                        char sep = separatorChars.charAt(0);

                        label71:
                        while(true) {
                            while(true) {
                                if (i >= len) {
                                    break label71;
                                }

                                if (str.charAt(i) == sep) {
                                    if (match || preserveAllTokens) {
                                        lastMatch = true;
                                        if (sizePlus1++ == max) {
                                            i = len;
                                            lastMatch = false;
                                        }

                                        list.add(str.substring(start, i));
                                        match = false;
                                    }

                                    ++i;
                                    start = i;
                                } else {
                                    lastMatch = false;
                                    match = true;
                                    ++i;
                                }
                            }
                        }
                    }
                } else {
                    label103:
                    while(true) {
                        while(true) {
                            if (i >= len) {
                                break label103;
                            }

                            if (Character.isWhitespace(str.charAt(i))) {
                                if (match || preserveAllTokens) {
                                    lastMatch = true;
                                    if (sizePlus1++ == max) {
                                        i = len;
                                        lastMatch = false;
                                    }

                                    list.add(str.substring(start, i));
                                    match = false;
                                }

                                ++i;
                                start = i;
                            } else {
                                lastMatch = false;
                                match = true;
                                ++i;
                            }
                        }
                    }
                }

                if (match || preserveAllTokens && lastMatch) {
                    list.add(str.substring(start, i));
                }

                return (String[])list.toArray(new String[list.size()]);
            }
        }
    }

    public static String[] splitByCharacterType(String str) {
        return splitByCharacterType(str, false);
    }

    public static String[] splitByCharacterTypeCamelCase(String str) {
        return splitByCharacterType(str, true);
    }

    private static String[] splitByCharacterType(String str, boolean camelCase) {
        if (str == null) {
            return null;
        } else if (str.isEmpty()) {
            return ArrayUtils.EMPTY_STRING_ARRAY;
        } else {
            char[] c = str.toCharArray();
            List<String> list = new ArrayList();
            int tokenStart = 0;
            int currentType = Character.getType(c[tokenStart]);

            for(int pos = tokenStart + 1; pos < c.length; ++pos) {
                int type = Character.getType(c[pos]);
                if (type != currentType) {
                    if (camelCase && type == 2 && currentType == 1) {
                        int newTokenStart = pos - 1;
                        if (newTokenStart != tokenStart) {
                            list.add(new String(c, tokenStart, newTokenStart - tokenStart));
                            tokenStart = newTokenStart;
                        }
                    } else {
                        list.add(new String(c, tokenStart, pos - tokenStart));
                        tokenStart = pos;
                    }

                    currentType = type;
                }
            }

            list.add(new String(c, tokenStart, c.length - tokenStart));
            return (String[])list.toArray(new String[list.size()]);
        }
    }

    @SafeVarargs
    public static <T> String join(T... elements) {
        return join((Object[])elements, (String)null);
    }

    public static String join(Object[] array, char separator) {
        return array == null ? null : join((Object[])array, separator, 0, array.length);
    }

    public static String join(long[] array, char separator) {
        return array == null ? null : join((long[])array, separator, 0, array.length);
    }

    public static String join(int[] array, char separator) {
        return array == null ? null : join((int[])array, separator, 0, array.length);
    }

    public static String join(short[] array, char separator) {
        return array == null ? null : join((short[])array, separator, 0, array.length);
    }

    public static String join(byte[] array, char separator) {
        return array == null ? null : join((byte[])array, separator, 0, array.length);
    }

    public static String join(char[] array, char separator) {
        return array == null ? null : join((char[])array, separator, 0, array.length);
    }

    public static String join(float[] array, char separator) {
        return array == null ? null : join((float[])array, separator, 0, array.length);
    }

    public static String join(double[] array, char separator) {
        return array == null ? null : join((double[])array, separator, 0, array.length);
    }

    public static String join(Object[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    if (array[i] != null) {
                        buf.append(array[i]);
                    }
                }

                return buf.toString();
            }
        }
    }

    public static String join(long[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(int[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(byte[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(short[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(char[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(double[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(float[] array, char separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    buf.append(array[i]);
                }

                return buf.toString();
            }
        }
    }

    public static String join(Object[] array, String separator) {
        return array == null ? null : join(array, separator, 0, array.length);
    }

    public static String join(Object[] array, String separator, int startIndex, int endIndex) {
        if (array == null) {
            return null;
        } else {
            if (separator == null) {
                separator = "";
            }

            int noOfItems = endIndex - startIndex;
            if (noOfItems <= 0) {
                return "";
            } else {
                StringBuilder buf = new StringBuilder(noOfItems * 16);

                for(int i = startIndex; i < endIndex; ++i) {
                    if (i > startIndex) {
                        buf.append(separator);
                    }

                    if (array[i] != null) {
                        buf.append(array[i]);
                    }
                }

                return buf.toString();
            }
        }
    }

    public static String join(Iterator<?> iterator, char separator) {
        if (iterator == null) {
            return null;
        } else if (!iterator.hasNext()) {
            return "";
        } else {
            Object first = iterator.next();
            if (!iterator.hasNext()) {
                String result = Objects.toString(first, "");
                return result;
            } else {
                StringBuilder buf = new StringBuilder(256);
                if (first != null) {
                    buf.append(first);
                }

                while(iterator.hasNext()) {
                    buf.append(separator);
                    Object obj = iterator.next();
                    if (obj != null) {
                        buf.append(obj);
                    }
                }

                return buf.toString();
            }
        }
    }

    public static String join(Iterator<?> iterator, String separator) {
        if (iterator == null) {
            return null;
        } else if (!iterator.hasNext()) {
            return "";
        } else {
            Object first = iterator.next();
            if (!iterator.hasNext()) {
                String result = Objects.toString(first, "");
                return result;
            } else {
                StringBuilder buf = new StringBuilder(256);
                if (first != null) {
                    buf.append(first);
                }

                while(iterator.hasNext()) {
                    if (separator != null) {
                        buf.append(separator);
                    }

                    Object obj = iterator.next();
                    if (obj != null) {
                        buf.append(obj);
                    }
                }

                return buf.toString();
            }
        }
    }

    public static String join(Iterable<?> iterable, char separator) {
        return iterable == null ? null : join(iterable.iterator(), separator);
    }

    public static String join(Iterable<?> iterable, String separator) {
        return iterable == null ? null : join(iterable.iterator(), separator);
    }

    public static String joinWith(String separator, Object... objects) {
        if (objects == null) {
            throw new IllegalArgumentException("Object varargs must not be null");
        } else {
            String sanitizedSeparator = defaultString(separator, "");
            StringBuilder result = new StringBuilder();
            Iterator iterator = Arrays.asList(objects).iterator();

            while(iterator.hasNext()) {
                String value = Objects.toString(iterator.next(), "");
                result.append(value);
                if (iterator.hasNext()) {
                    result.append(sanitizedSeparator);
                }
            }

            return result.toString();
        }
    }

    public static String deleteWhitespace(String str) {
        if (isEmpty(str)) {
            return str;
        } else {
            int sz = str.length();
            char[] chs = new char[sz];
            int count = 0;

            for(int i = 0; i < sz; ++i) {
                if (!Character.isWhitespace(str.charAt(i))) {
                    chs[count++] = str.charAt(i);
                }
            }

            if (count == sz) {
                return str;
            } else {
                return new String(chs, 0, count);
            }
        }
    }

    public static String removeStart(String str, String remove) {
        if (!isEmpty(str) && !isEmpty(remove)) {
            return str.startsWith(remove) ? str.substring(remove.length()) : str;
        } else {
            return str;
        }
    }

    public static String removeStartIgnoreCase(String str, String remove) {
        if (!isEmpty(str) && !isEmpty(remove)) {
            return startsWithIgnoreCase(str, remove) ? str.substring(remove.length()) : str;
        } else {
            return str;
        }
    }

    public static String removeEnd(String str, String remove) {
        if (!isEmpty(str) && !isEmpty(remove)) {
            return str.endsWith(remove) ? str.substring(0, str.length() - remove.length()) : str;
        } else {
            return str;
        }
    }

    public static String removeEndIgnoreCase(String str, String remove) {
        if (!isEmpty(str) && !isEmpty(remove)) {
            return endsWithIgnoreCase(str, remove) ? str.substring(0, str.length() - remove.length()) : str;
        } else {
            return str;
        }
    }

    public static String remove(String str, String remove) {
        return !isEmpty(str) && !isEmpty(remove) ? replace(str, remove, "", -1) : str;
    }

    public static String removeIgnoreCase(String str, String remove) {
        return !isEmpty(str) && !isEmpty(remove) ? replaceIgnoreCase(str, remove, "", -1) : str;
    }

    public static String remove(String str, char remove) {
        if (!isEmpty(str) && str.indexOf(remove) != -1) {
            char[] chars = str.toCharArray();
            int pos = 0;

            for(int i = 0; i < chars.length; ++i) {
                if (chars[i] != remove) {
                    chars[pos++] = chars[i];
                }
            }

            return new String(chars, 0, pos);
        } else {
            return str;
        }
    }

    public static String removeAll(String text, String regex) {
        return replaceAll(text, regex, "");
    }

    public static String removeFirst(String text, String regex) {
        return replaceFirst(text, regex, "");
    }

    public static String replaceOnce(String text, String searchString, String replacement) {
        return replace(text, searchString, replacement, 1);
    }

    public static String replaceOnceIgnoreCase(String text, String searchString, String replacement) {
        return replaceIgnoreCase(text, searchString, replacement, 1);
    }

    public static String replacePattern(String source, String regex, String replacement) {
        return source != null && regex != null && replacement != null ? Pattern.compile(regex, 32).matcher(source).replaceAll(replacement) : source;
    }

    public static String removePattern(String source, String regex) {
        return replacePattern(source, regex, "");
    }

    public static String replaceAll(String text, String regex, String replacement) {
        return text != null && regex != null && replacement != null ? text.replaceAll(regex, replacement) : text;
    }

    public static String replaceFirst(String text, String regex, String replacement) {
        return text != null && regex != null && replacement != null ? text.replaceFirst(regex, replacement) : text;
    }

    public static String replace(String text, String searchString, String replacement) {
        return replace(text, searchString, replacement, -1);
    }

    public static String replaceIgnoreCase(String text, String searchString, String replacement) {
        return replaceIgnoreCase(text, searchString, replacement, -1);
    }

    public static String replace(String text, String searchString, String replacement, int max) {
        return replace(text, searchString, replacement, max, false);
    }

    private static String replace(String text, String searchString, String replacement, int max, boolean ignoreCase) {
        if (!isEmpty(text) && !isEmpty(searchString) && replacement != null && max != 0) {
            String searchText = text;
            if (ignoreCase) {
                searchText = text.toLowerCase();
                searchString = searchString.toLowerCase();
            }

            int start = 0;
            int end = searchText.indexOf(searchString, start);
            if (end == -1) {
                return text;
            } else {
                int replLength = searchString.length();
                int increase = replacement.length() - replLength;
                increase = increase < 0 ? 0 : increase;
                increase *= max < 0 ? 16 : (max > 64 ? 64 : max);

                StringBuilder buf;
                for(buf = new StringBuilder(text.length() + increase); end != -1; end = searchText.indexOf(searchString, start)) {
                    buf.append(text.substring(start, end)).append(replacement);
                    start = end + replLength;
                    --max;
                    if (max == 0) {
                        break;
                    }
                }

                buf.append(text.substring(start));
                return buf.toString();
            }
        } else {
            return text;
        }
    }

    public static String replaceIgnoreCase(String text, String searchString, String replacement, int max) {
        return replace(text, searchString, replacement, max, true);
    }

    public static String replaceEach(String text, String[] searchList, String[] replacementList) {
        return replaceEach(text, searchList, replacementList, false, 0);
    }

    public static String replaceEachRepeatedly(String text, String[] searchList, String[] replacementList) {
        int timeToLive = searchList == null ? 0 : searchList.length;
        return replaceEach(text, searchList, replacementList, true, timeToLive);
    }

    private static String replaceEach(String text, String[] searchList, String[] replacementList, boolean repeat, int timeToLive) {
        if (text != null && !text.isEmpty() && searchList != null && searchList.length != 0 && replacementList != null && replacementList.length != 0) {
            if (timeToLive < 0) {
                throw new IllegalStateException("Aborting to protect against StackOverflowError - output of one loop is the input of another");
            } else {
                int searchLength = searchList.length;
                int replacementLength = replacementList.length;
                if (searchLength != replacementLength) {
                    throw new IllegalArgumentException("Search and Replace array lengths don't match: " + searchLength + " vs " + replacementLength);
                } else {
                    boolean[] noMoreMatchesForReplIndex = new boolean[searchLength];
                    int textIndex = -1;
                    int replaceIndex = -1;
                    int tempIndex = true;

                    int start;
                    int tempIndex;
                    for(start = 0; start < searchLength; ++start) {
                        if (!noMoreMatchesForReplIndex[start] && searchList[start] != null && !searchList[start].isEmpty() && replacementList[start] != null) {
                            tempIndex = text.indexOf(searchList[start]);
                            if (tempIndex == -1) {
                                noMoreMatchesForReplIndex[start] = true;
                            } else if (textIndex == -1 || tempIndex < textIndex) {
                                textIndex = tempIndex;
                                replaceIndex = start;
                            }
                        }
                    }

                    if (textIndex == -1) {
                        return text;
                    } else {
                        start = 0;
                        int increase = 0;

                        int i;
                        for(int i = 0; i < searchList.length; ++i) {
                            if (searchList[i] != null && replacementList[i] != null) {
                                i = replacementList[i].length() - searchList[i].length();
                                if (i > 0) {
                                    increase += 3 * i;
                                }
                            }
                        }

                        increase = Math.min(increase, text.length() / 5);
                        StringBuilder buf = new StringBuilder(text.length() + increase);

                        while(textIndex != -1) {
                            for(i = start; i < textIndex; ++i) {
                                buf.append(text.charAt(i));
                            }

                            buf.append(replacementList[replaceIndex]);
                            start = textIndex + searchList[replaceIndex].length();
                            textIndex = -1;
                            replaceIndex = -1;
                            tempIndex = true;

                            for(i = 0; i < searchLength; ++i) {
                                if (!noMoreMatchesForReplIndex[i] && searchList[i] != null && !searchList[i].isEmpty() && replacementList[i] != null) {
                                    tempIndex = text.indexOf(searchList[i], start);
                                    if (tempIndex == -1) {
                                        noMoreMatchesForReplIndex[i] = true;
                                    } else if (textIndex == -1 || tempIndex < textIndex) {
                                        textIndex = tempIndex;
                                        replaceIndex = i;
                                    }
                                }
                            }
                        }

                        i = text.length();

                        for(int i = start; i < i; ++i) {
                            buf.append(text.charAt(i));
                        }

                        String result = buf.toString();
                        if (!repeat) {
                            return result;
                        } else {
                            return replaceEach(result, searchList, replacementList, repeat, timeToLive - 1);
                        }
                    }
                }
            }
        } else {
            return text;
        }
    }

    public static String replaceChars(String str, char searchChar, char replaceChar) {
        return str == null ? null : str.replace(searchChar, replaceChar);
    }

    public static String replaceChars(String str, String searchChars, String replaceChars) {
        if (!isEmpty(str) && !isEmpty(searchChars)) {
            if (replaceChars == null) {
                replaceChars = "";
            }

            boolean modified = false;
            int replaceCharsLength = replaceChars.length();
            int strLength = str.length();
            StringBuilder buf = new StringBuilder(strLength);

            for(int i = 0; i < strLength; ++i) {
                char ch = str.charAt(i);
                int index = searchChars.indexOf(ch);
                if (index >= 0) {
                    modified = true;
                    if (index < replaceCharsLength) {
                        buf.append(replaceChars.charAt(index));
                    }
                } else {
                    buf.append(ch);
                }
            }

            if (modified) {
                return buf.toString();
            } else {
                return str;
            }
        } else {
            return str;
        }
    }

    public static String overlay(String str, String overlay, int start, int end) {
        if (str == null) {
            return null;
        } else {
            if (overlay == null) {
                overlay = "";
            }

            int len = str.length();
            if (start < 0) {
                start = 0;
            }

            if (start > len) {
                start = len;
            }

            if (end < 0) {
                end = 0;
            }

            if (end > len) {
                end = len;
            }

            if (start > end) {
                int temp = start;
                start = end;
                end = temp;
            }

            return (new StringBuilder(len + start - end + overlay.length() + 1)).append(str.substring(0, start)).append(overlay).append(str.substring(end)).toString();
        }
    }

    public static String chomp(String str) {
        if (isEmpty(str)) {
            return str;
        } else if (str.length() == 1) {
            char ch = str.charAt(0);
            return ch != '\r' && ch != '\n' ? str : "";
        } else {
            int lastIdx = str.length() - 1;
            char last = str.charAt(lastIdx);
            if (last == '\n') {
                if (str.charAt(lastIdx - 1) == '\r') {
                    --lastIdx;
                }
            } else if (last != '\r') {
                ++lastIdx;
            }

            return str.substring(0, lastIdx);
        }
    }

    /** @deprecated */
    @Deprecated
    public static String chomp(String str, String separator) {
        return removeEnd(str, separator);
    }

    public static String chop(String str) {
        if (str == null) {
            return null;
        } else {
            int strLen = str.length();
            if (strLen < 2) {
                return "";
            } else {
                int lastIdx = strLen - 1;
                String ret = str.substring(0, lastIdx);
                char last = str.charAt(lastIdx);
                return last == '\n' && ret.charAt(lastIdx - 1) == '\r' ? ret.substring(0, lastIdx - 1) : ret;
            }
        }
    }

    public static String repeat(String str, int repeat) {
        if (str == null) {
            return null;
        } else if (repeat <= 0) {
            return "";
        } else {
            int inputLength = str.length();
            if (repeat != 1 && inputLength != 0) {
                if (inputLength == 1 && repeat <= 8192) {
                    return repeat(str.charAt(0), repeat);
                } else {
                    int outputLength = inputLength * repeat;
                    switch(inputLength) {
                    case 1:
                        return repeat(str.charAt(0), repeat);
                    case 2:
                        char ch0 = str.charAt(0);
                        char ch1 = str.charAt(1);
                        char[] output2 = new char[outputLength];

                        for(int i = repeat * 2 - 2; i >= 0; --i) {
                            output2[i] = ch0;
                            output2[i + 1] = ch1;
                            --i;
                        }

                        return new String(output2);
                    default:
                        StringBuilder buf = new StringBuilder(outputLength);

                        for(int i = 0; i < repeat; ++i) {
                            buf.append(str);
                        }

                        return buf.toString();
                    }
                }
            } else {
                return str;
            }
        }
    }

    public static String repeat(String str, String separator, int repeat) {
        if (str != null && separator != null) {
            String result = repeat(str + separator, repeat);
            return removeEnd(result, separator);
        } else {
            return repeat(str, repeat);
        }
    }

    public static String repeat(char ch, int repeat) {
        if (repeat <= 0) {
            return "";
        } else {
            char[] buf = new char[repeat];

            for(int i = repeat - 1; i >= 0; --i) {
                buf[i] = ch;
            }

            return new String(buf);
        }
    }

    public static String rightPad(String str, int size) {
        return rightPad(str, size, ' ');
    }

    public static String rightPad(String str, int size, char padChar) {
        if (str == null) {
            return null;
        } else {
            int pads = size - str.length();
            if (pads <= 0) {
                return str;
            } else {
                return pads > 8192 ? rightPad(str, size, String.valueOf(padChar)) : str.concat(repeat(padChar, pads));
            }
        }
    }

    public static String rightPad(String str, int size, String padStr) {
        if (str == null) {
            return null;
        } else {
            if (isEmpty(padStr)) {
                padStr = " ";
            }

            int padLen = padStr.length();
            int strLen = str.length();
            int pads = size - strLen;
            if (pads <= 0) {
                return str;
            } else if (padLen == 1 && pads <= 8192) {
                return rightPad(str, size, padStr.charAt(0));
            } else if (pads == padLen) {
                return str.concat(padStr);
            } else if (pads < padLen) {
                return str.concat(padStr.substring(0, pads));
            } else {
                char[] padding = new char[pads];
                char[] padChars = padStr.toCharArray();

                for(int i = 0; i < pads; ++i) {
                    padding[i] = padChars[i % padLen];
                }

                return str.concat(new String(padding));
            }
        }
    }

    public static String leftPad(String str, int size) {
        return leftPad(str, size, ' ');
    }

    public static String leftPad(String str, int size, char padChar) {
        if (str == null) {
            return null;
        } else {
            int pads = size - str.length();
            if (pads <= 0) {
                return str;
            } else {
                return pads > 8192 ? leftPad(str, size, String.valueOf(padChar)) : repeat(padChar, pads).concat(str);
            }
        }
    }

    public static String leftPad(String str, int size, String padStr) {
        if (str == null) {
            return null;
        } else {
            if (isEmpty(padStr)) {
                padStr = " ";
            }

            int padLen = padStr.length();
            int strLen = str.length();
            int pads = size - strLen;
            if (pads <= 0) {
                return str;
            } else if (padLen == 1 && pads <= 8192) {
                return leftPad(str, size, padStr.charAt(0));
            } else if (pads == padLen) {
                return padStr.concat(str);
            } else if (pads < padLen) {
                return padStr.substring(0, pads).concat(str);
            } else {
                char[] padding = new char[pads];
                char[] padChars = padStr.toCharArray();

                for(int i = 0; i < pads; ++i) {
                    padding[i] = padChars[i % padLen];
                }

                return (new String(padding)).concat(str);
            }
        }
    }

    public static int length(CharSequence cs) {
        return cs == null ? 0 : cs.length();
    }

    public static String center(String str, int size) {
        return center(str, size, ' ');
    }

    public static String center(String str, int size, char padChar) {
        if (str != null && size > 0) {
            int strLen = str.length();
            int pads = size - strLen;
            if (pads <= 0) {
                return str;
            } else {
                str = leftPad(str, strLen + pads / 2, padChar);
                str = rightPad(str, size, padChar);
                return str;
            }
        } else {
            return str;
        }
    }

    public static String center(String str, int size, String padStr) {
        if (str != null && size > 0) {
            if (isEmpty(padStr)) {
                padStr = " ";
            }

            int strLen = str.length();
            int pads = size - strLen;
            if (pads <= 0) {
                return str;
            } else {
                str = leftPad(str, strLen + pads / 2, padStr);
                str = rightPad(str, size, padStr);
                return str;
            }
        } else {
            return str;
        }
    }

    public static String upperCase(String str) {
        return str == null ? null : str.toUpperCase();
    }

    public static String upperCase(String str, Locale locale) {
        return str == null ? null : str.toUpperCase(locale);
    }

    public static String lowerCase(String str) {
        return str == null ? null : str.toLowerCase();
    }

    public static String lowerCase(String str, Locale locale) {
        return str == null ? null : str.toLowerCase(locale);
    }

    public static String capitalize(String str) {
        int strLen;
        if (str != null && (strLen = str.length()) != 0) {
            int firstCodepoint = str.codePointAt(0);
            int newCodePoint = Character.toTitleCase(firstCodepoint);
            if (firstCodepoint == newCodePoint) {
                return str;
            } else {
                int[] newCodePoints = new int[strLen];
                int outOffset = 0;
                int outOffset = outOffset + 1;
                newCodePoints[outOffset] = newCodePoint;

                int codepoint;
                for(int inOffset = Character.charCount(firstCodepoint); inOffset < strLen; inOffset += Character.charCount(codepoint)) {
                    codepoint = str.codePointAt(inOffset);
                    newCodePoints[outOffset++] = codepoint;
                }

                return new String(newCodePoints, 0, outOffset);
            }
        } else {
            return str;
        }
    }

    public static String uncapitalize(String str) {
        int strLen;
        if (str != null && (strLen = str.length()) != 0) {
            int firstCodepoint = str.codePointAt(0);
            int newCodePoint = Character.toLowerCase(firstCodepoint);
            if (firstCodepoint == newCodePoint) {
                return str;
            } else {
                int[] newCodePoints = new int[strLen];
                int outOffset = 0;
                int outOffset = outOffset + 1;
                newCodePoints[outOffset] = newCodePoint;

                int codepoint;
                for(int inOffset = Character.charCount(firstCodepoint); inOffset < strLen; inOffset += Character.charCount(codepoint)) {
                    codepoint = str.codePointAt(inOffset);
                    newCodePoints[outOffset++] = codepoint;
                }

                return new String(newCodePoints, 0, outOffset);
            }
        } else {
            return str;
        }
    }

    public static String swapCase(String str) {
        if (isEmpty(str)) {
            return str;
        } else {
            int strLen = str.length();
            int[] newCodePoints = new int[strLen];
            int outOffset = 0;

            int newCodePoint;
            for(int i = 0; i < strLen; i += Character.charCount(newCodePoint)) {
                int oldCodepoint = str.codePointAt(i);
                if (Character.isUpperCase(oldCodepoint)) {
                    newCodePoint = Character.toLowerCase(oldCodepoint);
                } else if (Character.isTitleCase(oldCodepoint)) {
                    newCodePoint = Character.toLowerCase(oldCodepoint);
                } else if (Character.isLowerCase(oldCodepoint)) {
                    newCodePoint = Character.toUpperCase(oldCodepoint);
                } else {
                    newCodePoint = oldCodepoint;
                }

                newCodePoints[outOffset++] = newCodePoint;
            }

            return new String(newCodePoints, 0, outOffset);
        }
    }

    public static int countMatches(CharSequence str, CharSequence sub) {
        if (!isEmpty(str) && !isEmpty(sub)) {
            int count = 0;

            for(int idx = 0; (idx = CharSequenceUtils.indexOf(str, sub, idx)) != -1; idx += sub.length()) {
                ++count;
            }

            return count;
        } else {
            return 0;
        }
    }

    public static int countMatches(CharSequence str, char ch) {
        if (isEmpty(str)) {
            return 0;
        } else {
            int count = 0;

            for(int i = 0; i < str.length(); ++i) {
                if (ch == str.charAt(i)) {
                    ++count;
                }
            }

            return count;
        }
    }

    public static boolean isAlpha(CharSequence cs) {
        if (isEmpty(cs)) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isLetter(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isAlphaSpace(CharSequence cs) {
        if (cs == null) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isLetter(cs.charAt(i)) && cs.charAt(i) != ' ') {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isAlphanumeric(CharSequence cs) {
        if (isEmpty(cs)) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isLetterOrDigit(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isAlphanumericSpace(CharSequence cs) {
        if (cs == null) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isLetterOrDigit(cs.charAt(i)) && cs.charAt(i) != ' ') {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isAsciiPrintable(CharSequence cs) {
        if (cs == null) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!CharUtils.isAsciiPrintable(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isNumeric(CharSequence cs) {
        if (isEmpty(cs)) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isDigit(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isNumericSpace(CharSequence cs) {
        if (cs == null) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isDigit(cs.charAt(i)) && cs.charAt(i) != ' ') {
                    return false;
                }
            }

            return true;
        }
    }

    public static String getDigits(String str) {
        if (isEmpty(str)) {
            return str;
        } else {
            int sz = str.length();
            StringBuilder strDigits = new StringBuilder(sz);

            for(int i = 0; i < sz; ++i) {
                char tempChar = str.charAt(i);
                if (Character.isDigit(tempChar)) {
                    strDigits.append(tempChar);
                }
            }

            return strDigits.toString();
        }
    }

    public static boolean isWhitespace(CharSequence cs) {
        if (cs == null) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isWhitespace(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isAllLowerCase(CharSequence cs) {
        if (cs != null && !isEmpty(cs)) {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isLowerCase(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        } else {
            return false;
        }
    }

    public static boolean isAllUpperCase(CharSequence cs) {
        if (cs != null && !isEmpty(cs)) {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isUpperCase(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        } else {
            return false;
        }
    }

    public static boolean isMixedCase(CharSequence cs) {
        if (!isEmpty(cs) && cs.length() != 1) {
            boolean containsUppercase = false;
            boolean containsLowercase = false;
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (containsUppercase && containsLowercase) {
                    return true;
                }

                if (Character.isUpperCase(cs.charAt(i))) {
                    containsUppercase = true;
                } else if (Character.isLowerCase(cs.charAt(i))) {
                    containsLowercase = true;
                }
            }

            return containsUppercase && containsLowercase;
        } else {
            return false;
        }
    }

    public static String defaultString(String str) {
        return str == null ? "" : str;
    }

    public static String defaultString(String str, String defaultStr) {
        return str == null ? defaultStr : str;
    }

    public static <T extends CharSequence> T defaultIfBlank(T str, T defaultStr) {
        return isBlank(str) ? defaultStr : str;
    }

    public static <T extends CharSequence> T defaultIfEmpty(T str, T defaultStr) {
        return isEmpty(str) ? defaultStr : str;
    }

    public static String rotate(String str, int shift) {
        if (str == null) {
            return null;
        } else {
            int strLen = str.length();
            if (shift != 0 && strLen != 0 && shift % strLen != 0) {
                StringBuilder builder = new StringBuilder(strLen);
                int offset = -(shift % strLen);
                builder.append(substring(str, offset));
                builder.append(substring(str, 0, offset));
                return builder.toString();
            } else {
                return str;
            }
        }
    }

    public static String reverse(String str) {
        return str == null ? null : (new StringBuilder(str)).reverse().toString();
    }

    public static String reverseDelimited(String str, char separatorChar) {
        if (str == null) {
            return null;
        } else {
            String[] strs = split(str, separatorChar);
            ArrayUtils.reverse(strs);
            return join((Object[])strs, separatorChar);
        }
    }

    public static String abbreviate(String str, int maxWidth) {
        String defaultAbbrevMarker = "...";
        return abbreviate(str, "...", 0, maxWidth);
    }

    public static String abbreviate(String str, int offset, int maxWidth) {
        String defaultAbbrevMarker = "...";
        return abbreviate(str, "...", offset, maxWidth);
    }

    public static String abbreviate(String str, String abbrevMarker, int maxWidth) {
        return abbreviate(str, abbrevMarker, 0, maxWidth);
    }

    public static String abbreviate(String str, String abbrevMarker, int offset, int maxWidth) {
        if (!isEmpty(str) && !isEmpty(abbrevMarker)) {
            int abbrevMarkerLength = abbrevMarker.length();
            int minAbbrevWidth = abbrevMarkerLength + 1;
            int minAbbrevWidthOffset = abbrevMarkerLength + abbrevMarkerLength + 1;
            if (maxWidth < minAbbrevWidth) {
                throw new IllegalArgumentException(String.format("Minimum abbreviation width is %d", minAbbrevWidth));
            } else if (str.length() <= maxWidth) {
                return str;
            } else {
                if (offset > str.length()) {
                    offset = str.length();
                }

                if (str.length() - offset < maxWidth - abbrevMarkerLength) {
                    offset = str.length() - (maxWidth - abbrevMarkerLength);
                }

                if (offset <= abbrevMarkerLength + 1) {
                    return str.substring(0, maxWidth - abbrevMarkerLength) + abbrevMarker;
                } else if (maxWidth < minAbbrevWidthOffset) {
                    throw new IllegalArgumentException(String.format("Minimum abbreviation width with offset is %d", minAbbrevWidthOffset));
                } else {
                    return offset + maxWidth - abbrevMarkerLength < str.length() ? abbrevMarker + abbreviate(str.substring(offset), abbrevMarker, maxWidth - abbrevMarkerLength) : abbrevMarker + str.substring(str.length() - (maxWidth - abbrevMarkerLength));
                }
            }
        } else {
            return str;
        }
    }

    public static String abbreviateMiddle(String str, String middle, int length) {
        if (!isEmpty(str) && !isEmpty(middle)) {
            if (length < str.length() && length >= middle.length() + 2) {
                int targetSting = length - middle.length();
                int startOffset = targetSting / 2 + targetSting % 2;
                int endOffset = str.length() - targetSting / 2;
                StringBuilder builder = new StringBuilder(length);
                builder.append(str.substring(0, startOffset));
                builder.append(middle);
                builder.append(str.substring(endOffset));
                return builder.toString();
            } else {
                return str;
            }
        } else {
            return str;
        }
    }

    public static String difference(String str1, String str2) {
        if (str1 == null) {
            return str2;
        } else if (str2 == null) {
            return str1;
        } else {
            int at = indexOfDifference(str1, str2);
            return at == -1 ? "" : str2.substring(at);
        }
    }

    public static int indexOfDifference(CharSequence cs1, CharSequence cs2) {
        if (cs1 == cs2) {
            return -1;
        } else if (cs1 != null && cs2 != null) {
            int i;
            for(i = 0; i < cs1.length() && i < cs2.length() && cs1.charAt(i) == cs2.charAt(i); ++i) {
                ;
            }

            return i >= cs2.length() && i >= cs1.length() ? -1 : i;
        } else {
            return 0;
        }
    }

    public static int indexOfDifference(CharSequence... css) {
        if (css != null && css.length > 1) {
            boolean anyStringNull = false;
            boolean allStringsNull = true;
            int arrayLen = css.length;
            int shortestStrLen = 2147483647;
            int longestStrLen = 0;
            CharSequence[] var6 = css;
            int stringPos = css.length;

            for(int var8 = 0; var8 < stringPos; ++var8) {
                CharSequence cs = var6[var8];
                if (cs == null) {
                    anyStringNull = true;
                    shortestStrLen = 0;
                } else {
                    allStringsNull = false;
                    shortestStrLen = Math.min(cs.length(), shortestStrLen);
                    longestStrLen = Math.max(cs.length(), longestStrLen);
                }
            }

            if (allStringsNull || longestStrLen == 0 && !anyStringNull) {
                return -1;
            } else if (shortestStrLen == 0) {
                return 0;
            } else {
                int firstDiff = -1;

                for(stringPos = 0; stringPos < shortestStrLen; ++stringPos) {
                    char comparisonChar = css[0].charAt(stringPos);

                    for(int arrayPos = 1; arrayPos < arrayLen; ++arrayPos) {
                        if (css[arrayPos].charAt(stringPos) != comparisonChar) {
                            firstDiff = stringPos;
                            break;
                        }
                    }

                    if (firstDiff != -1) {
                        break;
                    }
                }

                return firstDiff == -1 && shortestStrLen != longestStrLen ? shortestStrLen : firstDiff;
            }
        } else {
            return -1;
        }
    }

    public static String getCommonPrefix(String... strs) {
        if (strs != null && strs.length != 0) {
            int smallestIndexOfDiff = indexOfDifference(strs);
            if (smallestIndexOfDiff == -1) {
                return strs[0] == null ? "" : strs[0];
            } else {
                return smallestIndexOfDiff == 0 ? "" : strs[0].substring(0, smallestIndexOfDiff);
            }
        } else {
            return "";
        }
    }

    /** @deprecated */
    @Deprecated
    public static int getLevenshteinDistance(CharSequence s, CharSequence t) {
        if (s != null && t != null) {
            int n = s.length();
            int m = t.length();
            if (n == 0) {
                return m;
            } else if (m == 0) {
                return n;
            } else {
                if (n > m) {
                    CharSequence tmp = s;
                    s = t;
                    t = tmp;
                    n = m;
                    m = tmp.length();
                }

                int[] p = new int[n + 1];

                int i;
                for(i = 0; i <= n; p[i] = i++) {
                    ;
                }

                for(int j = 1; j <= m; ++j) {
                    int upper_left = p[0];
                    char t_j = t.charAt(j - 1);
                    p[0] = j;

                    for(i = 1; i <= n; ++i) {
                        int upper = p[i];
                        int cost = s.charAt(i - 1) == t_j ? 0 : 1;
                        p[i] = Math.min(Math.min(p[i - 1] + 1, p[i] + 1), upper_left + cost);
                        upper_left = upper;
                    }
                }

                return p[n];
            }
        } else {
            throw new IllegalArgumentException("Strings must not be null");
        }
    }

    /** @deprecated */
    @Deprecated
    public static int getLevenshteinDistance(CharSequence s, CharSequence t, int threshold) {
        if (s != null && t != null) {
            if (threshold < 0) {
                throw new IllegalArgumentException("Threshold must not be negative");
            } else {
                int n = s.length();
                int m = t.length();
                if (n == 0) {
                    return m <= threshold ? m : -1;
                } else if (m == 0) {
                    return n <= threshold ? n : -1;
                } else if (Math.abs(n - m) > threshold) {
                    return -1;
                } else {
                    if (n > m) {
                        CharSequence tmp = s;
                        s = t;
                        t = tmp;
                        n = m;
                        m = tmp.length();
                    }

                    int[] p = new int[n + 1];
                    int[] d = new int[n + 1];
                    int boundary = Math.min(n, threshold) + 1;

                    int j;
                    for(j = 0; j < boundary; p[j] = j++) {
                        ;
                    }

                    Arrays.fill(p, boundary, p.length, 2147483647);
                    Arrays.fill(d, 2147483647);

                    for(j = 1; j <= m; ++j) {
                        char t_j = t.charAt(j - 1);
                        d[0] = j;
                        int min = Math.max(1, j - threshold);
                        int max = j > 2147483647 - threshold ? n : Math.min(n, j + threshold);
                        if (min > max) {
                            return -1;
                        }

                        if (min > 1) {
                            d[min - 1] = 2147483647;
                        }

                        for(int i = min; i <= max; ++i) {
                            if (s.charAt(i - 1) == t_j) {
                                d[i] = p[i - 1];
                            } else {
                                d[i] = 1 + Math.min(Math.min(d[i - 1], p[i]), p[i - 1]);
                            }
                        }

                        int[] _d = p;
                        p = d;
                        d = _d;
                    }

                    if (p[n] <= threshold) {
                        return p[n];
                    } else {
                        return -1;
                    }
                }
            }
        } else {
            throw new IllegalArgumentException("Strings must not be null");
        }
    }

    /** @deprecated */
    @Deprecated
    public static double getJaroWinklerDistance(CharSequence first, CharSequence second) {
        double DEFAULT_SCALING_FACTOR = 0.1D;
        if (first != null && second != null) {
            int[] mtp = matches(first, second);
            double m = (double)mtp[0];
            if (m == 0.0D) {
                return 0.0D;
            } else {
                double j = (m / (double)first.length() + m / (double)second.length() + (m - (double)mtp[1]) / m) / 3.0D;
                double jw = j < 0.7D ? j : j + Math.min(0.1D, 1.0D / (double)mtp[3]) * (double)mtp[2] * (1.0D - j);
                return (double)Math.round(jw * 100.0D) / 100.0D;
            }
        } else {
            throw new IllegalArgumentException("Strings must not be null");
        }
    }

    private static int[] matches(CharSequence first, CharSequence second) {
        CharSequence max;
        CharSequence min;
        if (first.length() > second.length()) {
            max = first;
            min = second;
        } else {
            max = second;
            min = first;
        }

        int range = Math.max(max.length() / 2 - 1, 0);
        int[] matchIndexes = new int[min.length()];
        Arrays.fill(matchIndexes, -1);
        boolean[] matchFlags = new boolean[max.length()];
        int matches = 0;

        int transpositions;
        int prefix;
        for(int mi = 0; mi < min.length(); ++mi) {
            char c1 = min.charAt(mi);
            transpositions = Math.max(mi - range, 0);

            for(prefix = Math.min(mi + range + 1, max.length()); transpositions < prefix; ++transpositions) {
                if (!matchFlags[transpositions] && c1 == max.charAt(transpositions)) {
                    matchIndexes[mi] = transpositions;
                    matchFlags[transpositions] = true;
                    ++matches;
                    break;
                }
            }
        }

        char[] ms1 = new char[matches];
        char[] ms2 = new char[matches];
        transpositions = 0;

        for(prefix = 0; transpositions < min.length(); ++transpositions) {
            if (matchIndexes[transpositions] != -1) {
                ms1[prefix] = min.charAt(transpositions);
                ++prefix;
            }
        }

        transpositions = 0;

        for(prefix = 0; transpositions < max.length(); ++transpositions) {
            if (matchFlags[transpositions]) {
                ms2[prefix] = max.charAt(transpositions);
                ++prefix;
            }
        }

        transpositions = 0;

        for(prefix = 0; prefix < ms1.length; ++prefix) {
            if (ms1[prefix] != ms2[prefix]) {
                ++transpositions;
            }
        }

        prefix = 0;

        for(int mi = 0; mi < min.length() && first.charAt(mi) == second.charAt(mi); ++mi) {
            ++prefix;
        }

        return new int[]{matches, transpositions / 2, prefix, max.length()};
    }

    /** @deprecated */
    @Deprecated
    public static int getFuzzyDistance(CharSequence term, CharSequence query, Locale locale) {
        if (term != null && query != null) {
            if (locale == null) {
                throw new IllegalArgumentException("Locale must not be null");
            } else {
                String termLowerCase = term.toString().toLowerCase(locale);
                String queryLowerCase = query.toString().toLowerCase(locale);
                int score = 0;
                int termIndex = 0;
                int previousMatchingCharacterIndex = -2147483648;

                for(int queryIndex = 0; queryIndex < queryLowerCase.length(); ++queryIndex) {
                    char queryChar = queryLowerCase.charAt(queryIndex);

                    for(boolean termCharacterMatchFound = false; termIndex < termLowerCase.length() && !termCharacterMatchFound; ++termIndex) {
                        char termChar = termLowerCase.charAt(termIndex);
                        if (queryChar == termChar) {
                            ++score;
                            if (previousMatchingCharacterIndex + 1 == termIndex) {
                                score += 2;
                            }

                            previousMatchingCharacterIndex = termIndex;
                            termCharacterMatchFound = true;
                        }
                    }
                }

                return score;
            }
        } else {
            throw new IllegalArgumentException("Strings must not be null");
        }
    }

    public static boolean startsWith(CharSequence str, CharSequence prefix) {
        return startsWith(str, prefix, false);
    }

    public static boolean startsWithIgnoreCase(CharSequence str, CharSequence prefix) {
        return startsWith(str, prefix, true);
    }

    private static boolean startsWith(CharSequence str, CharSequence prefix, boolean ignoreCase) {
        if (str != null && prefix != null) {
            return prefix.length() > str.length() ? false : CharSequenceUtils.regionMatches(str, ignoreCase, 0, prefix, 0, prefix.length());
        } else {
            return str == null && prefix == null;
        }
    }

    public static boolean startsWithAny(CharSequence sequence, CharSequence... searchStrings) {
        if (!isEmpty(sequence) && !ArrayUtils.isEmpty(searchStrings)) {
            CharSequence[] var2 = searchStrings;
            int var3 = searchStrings.length;

            for(int var4 = 0; var4 < var3; ++var4) {
                CharSequence searchString = var2[var4];
                if (startsWith(sequence, searchString)) {
                    return true;
                }
            }

            return false;
        } else {
            return false;
        }
    }

    public static boolean endsWith(CharSequence str, CharSequence suffix) {
        return endsWith(str, suffix, false);
    }

    public static boolean endsWithIgnoreCase(CharSequence str, CharSequence suffix) {
        return endsWith(str, suffix, true);
    }

    private static boolean endsWith(CharSequence str, CharSequence suffix, boolean ignoreCase) {
        if (str != null && suffix != null) {
            if (suffix.length() > str.length()) {
                return false;
            } else {
                int strOffset = str.length() - suffix.length();
                return CharSequenceUtils.regionMatches(str, ignoreCase, strOffset, suffix, 0, suffix.length());
            }
        } else {
            return str == null && suffix == null;
        }
    }

    public static String normalizeSpace(String str) {
        if (isEmpty(str)) {
            return str;
        } else {
            int size = str.length();
            char[] newChars = new char[size];
            int count = 0;
            int whitespacesCount = 0;
            boolean startWhitespaces = true;

            for(int i = 0; i < size; ++i) {
                char actualChar = str.charAt(i);
                boolean isWhitespace = Character.isWhitespace(actualChar);
                if (!isWhitespace) {
                    startWhitespaces = false;
                    newChars[count++] = actualChar == 160 ? 32 : actualChar;
                    whitespacesCount = 0;
                } else {
                    if (whitespacesCount == 0 && !startWhitespaces) {
                        newChars[count++] = " ".charAt(0);
                    }

                    ++whitespacesCount;
                }
            }

            if (startWhitespaces) {
                return "";
            } else {
                return (new String(newChars, 0, count - (whitespacesCount > 0 ? 1 : 0))).trim();
            }
        }
    }

    public static boolean endsWithAny(CharSequence sequence, CharSequence... searchStrings) {
        if (!isEmpty(sequence) && !ArrayUtils.isEmpty(searchStrings)) {
            CharSequence[] var2 = searchStrings;
            int var3 = searchStrings.length;

            for(int var4 = 0; var4 < var3; ++var4) {
                CharSequence searchString = var2[var4];
                if (endsWith(sequence, searchString)) {
                    return true;
                }
            }

            return false;
        } else {
            return false;
        }
    }

    private static String appendIfMissing(String str, CharSequence suffix, boolean ignoreCase, CharSequence... suffixes) {
        if (str != null && !isEmpty(suffix) && !endsWith(str, suffix, ignoreCase)) {
            if (suffixes != null && suffixes.length > 0) {
                CharSequence[] var4 = suffixes;
                int var5 = suffixes.length;

                for(int var6 = 0; var6 < var5; ++var6) {
                    CharSequence s = var4[var6];
                    if (endsWith(str, s, ignoreCase)) {
                        return str;
                    }
                }
            }

            return str + suffix.toString();
        } else {
            return str;
        }
    }

    public static String appendIfMissing(String str, CharSequence suffix, CharSequence... suffixes) {
        return appendIfMissing(str, suffix, false, suffixes);
    }

    public static String appendIfMissingIgnoreCase(String str, CharSequence suffix, CharSequence... suffixes) {
        return appendIfMissing(str, suffix, true, suffixes);
    }

    private static String prependIfMissing(String str, CharSequence prefix, boolean ignoreCase, CharSequence... prefixes) {
        if (str != null && !isEmpty(prefix) && !startsWith(str, prefix, ignoreCase)) {
            if (prefixes != null && prefixes.length > 0) {
                CharSequence[] var4 = prefixes;
                int var5 = prefixes.length;

                for(int var6 = 0; var6 < var5; ++var6) {
                    CharSequence p = var4[var6];
                    if (startsWith(str, p, ignoreCase)) {
                        return str;
                    }
                }
            }

            return prefix.toString() + str;
        } else {
            return str;
        }
    }

    public static String prependIfMissing(String str, CharSequence prefix, CharSequence... prefixes) {
        return prependIfMissing(str, prefix, false, prefixes);
    }

    public static String prependIfMissingIgnoreCase(String str, CharSequence prefix, CharSequence... prefixes) {
        return prependIfMissing(str, prefix, true, prefixes);
    }

    /** @deprecated */
    @Deprecated
    public static String toString(byte[] bytes, String charsetName) throws UnsupportedEncodingException {
        return charsetName != null ? new String(bytes, charsetName) : new String(bytes, Charset.defaultCharset());
    }

    public static String toEncodedString(byte[] bytes, Charset charset) {
        return new String(bytes, charset != null ? charset : Charset.defaultCharset());
    }

    public static String wrap(String str, char wrapWith) {
        return !isEmpty(str) && wrapWith != 0 ? wrapWith + str + wrapWith : str;
    }

    public static String wrap(String str, String wrapWith) {
        return !isEmpty(str) && !isEmpty(wrapWith) ? wrapWith.concat(str).concat(wrapWith) : str;
    }

    public static String wrapIfMissing(String str, char wrapWith) {
        if (!isEmpty(str) && wrapWith != 0) {
            StringBuilder builder = new StringBuilder(str.length() + 2);
            if (str.charAt(0) != wrapWith) {
                builder.append(wrapWith);
            }

            builder.append(str);
            if (str.charAt(str.length() - 1) != wrapWith) {
                builder.append(wrapWith);
            }

            return builder.toString();
        } else {
            return str;
        }
    }

    public static String wrapIfMissing(String str, String wrapWith) {
        if (!isEmpty(str) && !isEmpty(wrapWith)) {
            StringBuilder builder = new StringBuilder(str.length() + wrapWith.length() + wrapWith.length());
            if (!str.startsWith(wrapWith)) {
                builder.append(wrapWith);
            }

            builder.append(str);
            if (!str.endsWith(wrapWith)) {
                builder.append(wrapWith);
            }

            return builder.toString();
        } else {
            return str;
        }
    }

    public static String unwrap(String str, String wrapToken) {
        if (!isEmpty(str) && !isEmpty(wrapToken)) {
            if (startsWith(str, wrapToken) && endsWith(str, wrapToken)) {
                int startIndex = str.indexOf(wrapToken);
                int endIndex = str.lastIndexOf(wrapToken);
                int wrapLength = wrapToken.length();
                if (startIndex != -1 && endIndex != -1) {
                    return str.substring(startIndex + wrapLength, endIndex);
                }
            }

            return str;
        } else {
            return str;
        }
    }

    public static String unwrap(String str, char wrapChar) {
        if (!isEmpty(str) && wrapChar != 0) {
            if (str.charAt(0) == wrapChar && str.charAt(str.length() - 1) == wrapChar) {
                int startIndex = false;
                int endIndex = str.length() - 1;
                if (endIndex != -1) {
                    return str.substring(1, endIndex);
                }
            }

            return str;
        } else {
            return str;
        }
    }

    public static int[] toCodePoints(CharSequence str) {
        if (str == null) {
            return null;
        } else if (str.length() == 0) {
            return ArrayUtils.EMPTY_INT_ARRAY;
        } else {
            String s = str.toString();
            int[] result = new int[s.codePointCount(0, s.length())];
            int index = 0;

            for(int i = 0; i < result.length; ++i) {
                result[i] = s.codePointAt(index);
                index += Character.charCount(result[i]);
            }

            return result;
        }
    }
}

　　　　1.1.4 坑01

　　　　　　传入到isNumeric的实参如果为空时任然会判定为数字，原因重isNumeric的源码中可以看出

public static boolean isNumeric(CharSequence cs) {
        if (isEmpty(cs)) {
            return false;
        } else {
            int sz = cs.length();

            for(int i = 0; i < sz; ++i) {
                if (!Character.isDigit(cs.charAt(i))) {
                    return false;
                }
            }

            return true;
        }
    }

　　　　1.1.5 坑02

　　　　　　传入到isNumeric的实参如果开始和结束有空格时，不会被判定为数字

　　1.2 自定义判断方法

　　　　

 

　　　　1.2.1 调用strim方法去除掉参数两边的空格

// 01 去掉字符串两边的空格
        string = StringUtils.trim(string);

　　　　1.2.2 调用isEmpty方法判断参数是否为空

// 02 判断字符串是否为空（null 或 ”“ 就被认定为空）
        if (StringUtils.isNoneEmpty(string)) {
            // 03 判断字符串是否全部是数字
            if (StringUtils.isNumeric(string)) {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }

package cn.xiangxu.springboottest.utils;

//import org.apache.commons.lang.StringUtils;

import org.apache.commons.lang3.StringUtils;

/**
 * 判断工具类
 */
public class JudgeUtil {

    /**
     * 判断一个字符串是否全部是数字
     * @param string 带判断的字符串
     * @return 判断结果
     */
    public static boolean allIsNumber(String string) {
        // 01 去掉字符串两边的空格
        string = StringUtils.trim(string);

        // 02 判断字符串是否为空（null 或 ”“ 就被认定为空）
        if (StringUtils.isNoneEmpty(string)) {
            // 03 判断字符串是否全部是数字
            if (StringUtils.isNumeric(string)) {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
}