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);			
		}
	}
}