题解 | 字符串反转

import java.util.*;

public class Main {
    public static void main(String[] args) {
        //接收输入的
        Scanner sc = new Scanner(System.in);
        //定义一个字符串
        String str = sc.nextLine();
        //将字符串反转
        StringBuilder  sb = new StringBuilder(str);
        sb.reverse();
        str=sb.toString();
        //输出字符串
        System.out.println(str);
    }
}