题目

www.nowcoder.com/practice/[e…](www.nowcoder.com/practice/e4…)

我的题解

**import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str;
        while ((str = bf.readLine()) != null) {
            StringBuilder sb = new StringBuilder(str);
            System.out.println(sb.reverse());
        }
    }
}**

思路：

1、StringBuilder的reverse方法使用

StringBuilder sb = new StringBuilder(str);
sb.reverse()

高效题解

和我一个思路