Java实现字符串反转的两种方法

package com_04;

import java.util.Scanner;

/*
 * 键盘录入一个字符串实现反转
 */
public class StringDemo3 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入一个字符串：");
		String str = sc.nextLine();
		String s = reverse(str);
		System.out.println(s);
		
	}
	/*
	 * public static String rev(String str) {
	
		String str1 = "";
		for(int i=str.length()-1;i>=0;i--) {
			 str1 += str.charAt(i);
		}
		return str1;
	}
	 */
	public static String reverse(String s) {
		char[] chs = s.toCharArray();
		
		for(int start=0,end=(chs.length-1);start<=end;start++,end--) {
			char temp = chs[start];
			chs[start] = chs[end];
			chs[end] = temp;
		}
		String ss = new String(chs);
		return ss;
	}
	
}