字符串反转 - 面试题

1、题目描述 - 如题

2、上代码

package 剑指Offfer;import java.io.InputStreamReader;
import java.util.Scanner;public class 字符串反转 {public static void main(String[] args) {Scanner in = new Scanner(new InputStreamReader(System.in));String str = in.next();char[] arr = str.toCharArray();reverse(arr, 0, arr.length - 1);System.out.println(new String(arr));}static void reverse(char[] arr, int l, int r) {for(int i = 0;i < (r - l)/2 + 1;i ++) {char tmp = arr[l + i];arr[l + i] = arr[r - i];arr[r - i] = tmp;}}}