package cn.itcast_07;

 import java.util.Scanner;

 /*

  * 把字符串反转

  */

 public class StringBufferTest3 {

     public static void main(String[] args) {

         // 键盘录入数据

         Scanner sc = new Scanner(System.in);

         System.out.println("请输入数据：");

         String s = sc.nextLine();

         // 方式1：用String做拼接

         String s1 = myReverse(s);

         System.out.println("s1:" + s1);

         // 方式2：用StringBuffer的reverse()功能

         String s2 = myReverse2(s);

         System.out.println("s2:" + s2);

     }

     // 用StringBuffer的reverse()功能

     public static String myReverse2(String s) {

         // StringBuffer sb = new StringBuffer();

         // sb.append(s);

         // StringBuffer sb = new StringBuffer(s);

         // sb.reverse();

         // return sb.toString();

         // 简易版

         return new StringBuffer(s).reverse().toString();

     }

     // 用String做拼接

     public static String myReverse(String s) {

         String result = "";

         char[] chs = s.toCharArray();

         for (int x = chs.length - 1; x >= 0; x--) {

             // char ch = chs[x];

             // result += ch;

             result += chs[x];

         }

         return result;

     }

 }