题解 | #字符逆序#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str = in.nextLine();
        System.out.println(reverse(str));
    }
    public static String reverse(String str){
        StringBuilder sb = new StringBuilder();
        sb.append(str);
        return sb.reverse().toString();
    }
}

知识点：

StringBuilder 的 reverse 放法： 将 I am a students 转换成了

tneduts a ma I