字符串反转的两种方法

第一种笨方法

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

/**
 * 先接收每一行
 * 每一行按照空格分成不同的字符串数组
 * 倒叙输出数组
 * @author j14131
 *
 */
public class 字符串反转加密 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        while(scanner.hasNext()) {
            String string=scanner.nextLine();
            int blankNum=0;
            List<Integer> list=new ArrayList();
            list.add(0);
            for(int i=0;i<string.length();i++) {
                char blank=string.charAt(i);
                int test=blank-' ';
                if(test==0) {
                    blankNum++;
                    list.add(i);
                }
            }
            list.add(string.length());
            int length=++blankNum;
            String[] strList=new String[length];
            for(int i=0;i<length;i++) {
                //System.out.println(string.substring(list.get(i), list.get(i+1)));
                if(i!=0)
                    strList[i]=string.substring(list.get(i)+1, list.get(i+1));
                else {
                    strList[i]=string.substring(list.get(i), list.get(i+1));
                }
            }
            for(int i=length-1;i>=0;i--) {
                if(i==0)
                    System.out.println(strList[i]);
                else {
                    System.out.print(strList[i]+" ");
                }
                
            }
            
        }
    }

}

第二种，直接使用方法切割

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class 字符串反转加密2 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        while(scanner.hasNext()) {
            String string=scanner.nextLine();
            String[] strList=string.split(" ");
            for (int i = strList.length-1; i >=0; i--) {
                String string1 = strList[i];
                if(i==0)
                    System.out.print(string1);
                else 
                    System.err.print(string1+" ");
            }
        }
        scanner.close();
    }
}