java 小技巧 利用for循环反转字符串

for循环倒着用  就可以实现字符串的反转

package com.heima.test;

import java.util.Scanner;

/**
* 字符串反转 输入abc 输出cba
*
* @author fenuang
*
*/
public class zifuchuanfanzhuan {

public static void main(String[] args) {
// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);
System.out.println("请输入一个字符窜");

String arr= sc.nextLine();
char[] arr1 = arr.toCharArray();
String arr2 = "";
for (int i = arr1.length-1; i >= 0 ; i--) {
arr2 = arr2 + arr1[i];
}
System.out.println(arr2);

}

}