OJ---字符逆序

直接使用StringBuilder的reverse()方法

import java.util.*;

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