package test;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class zimu {
private static String formattedDecimalToPercentage(double decimal)
{
//获取格式化对象
NumberFormat nt = NumberFormat.getPercentInstance();
//设置百分数精确度2即保留两位小数
nt.setMinimumFractionDigits(2);
return nt.format(decimal);
}
public static void main(String []args) {
String a1;
char a='A';
int a2[]=new int[27];
char b1[]=new char[26];
char b2[]=new char[26];
double c1[]=new double[26];
for(int i=0;i<26;i++)
{
b1[i]=a;
b2[i]=(char)(a+32);
a++;
}
try {
BufferedReader in = new BufferedReader(new FileReader("D:\\piao.txt"));
String str;
while ((str = in.readLine()) != null) {
char[] d=str.toCharArray();
for(int i=0;i<d.length-1;i++) {
for(int j=0;j<26;j++) {
if(b1[j]==d[i]||b2[j]==d[i]) {
a2[j]++;
}
}
}
}
a2[26]=0;
for(int i=0;i<26;i++) {
a2[26]=a2[i]+a2[26];
}
for(int i=0;i<26;i++) {
c1[i]=(double)((double)a2[i]/(double)a2[26]);
}
for(int i=0;i<26;i++) {
System.out.print(b1[i]);
System.out.print("和");
System.out.print(b2[i]);
System.out.print("出现的次数为：");
System.out.print(a2[i]);
double d=(double)((double)a2[i]/(double)a2[26]);
String result2=formattedDecimalToPercentage(d);
System.out.println(" 百分比为："+result2);
}
System.out.println(" ");
System.out.println("出现单词次数较多的前十个为：");
BufferedReader reader = new BufferedReader(new FileReader(
"D:\\\\piao.txt"));
StringBuffer buffer = new StringBuffer();
String line = null;
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
reader.close();
Pattern expression = Pattern.compile("[a-zA-Z]+");
String string = buffer.toString();
Matcher matcher = expression.matcher(string);//
Map<String, Integer> map = new TreeMap<String, Integer>();
String word = "";
int times = 0;
while (matcher.find()) {
word = matcher.group();
if (map.containsKey(word)) {
times = map.get(word);
map.put(word, times + 1);
} else {
map.put(word, 1);
}
}
List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(
map.entrySet());
Comparator<Map.Entry<String, Integer>> comparator = new Comparator<Map.Entry<String, Integer>>() {
public int compare(Map.Entry<String, Integer> left,
Map.Entry<String, Integer> right) {
return (left.getValue()).compareTo(right.getValue());
}
};
Collections.sort(list, comparator);// 排序
int last = list.size() - 1;
int asdad=0;
for(int i=last;i>0;i--) {
String key = list.get(i).getKey();
Integer value = list.get(i).getValue();
asdad=asdad+value;
}
for (int i = last; i > last - 10; i--) {
String key = list.get(i).getKey();
Integer value = list.get(i).getValue();
System.out.print(key + " :" + value);
double d=(double)((double)value/(double)asdad);
String result2=formattedDecimalToPercentage(d);
System.out.println(" 百分比为："+result2);
}
} catch (IOException e) {
}
}
}
