字符倒序

package com;

import java.util.Scanner;

public class Text2 {
public static void main(String[] args){
Scanner r = new Scanner(System.in);
while(true){
System.out.println("请输入要倒叙的字符串：");
String ss = r.next();
String s = ss;
int n = s.length();
int i=0;
while(i<n/2){
s=s.substring(0,i)+s.substring(n-1-i,n-i)+s.substring(i+1,n-i-1)+s.substring(i,i+1)+s.substring(n-i,n);
i++;
}
System.out.println(s);
}
}
}