java - 反转java中的每一行输入

Question

我的代码无法反转输入的每一行。它应该看起来像:输入:

abc
def
ghi

输出:

cba
fed
ihg

如何修改？

import java.*;
import java.util.Scanner;

public class Reverse {
    public static void main(String[]args) {
        Scanner in = new Scanner(System.in);
        String s = new String();

        while (in.hasNextLine()) {
            s += in.nextLine() + "\n";
        }

        StringBuffer r = new StringBuffer(s);
        r = r.reverse();
        System.out.println(r);
    }
}

Answer 1

您正在反转字符串中的字符。您需要反转每行上的字符。

Scanner in = new Scanner(System.in);
String s = new String();

while(in.hasNextLine()){
     StringBuffer buf = new StringBuffer(in.nextLine());
     s += buf.reverse() + "\n";
}
System.out.println(s);