因此，当我尝试对IOFile进行一些练习时，我遇到了一个在txt文件上写字符串的问题，特别是在新文件中的每个句子之后写新行（\ n）的问题。

这是我的代码：

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Main {
 public static void main(String[] args) {

    File Lyrics = new File("Lyrics.txt");
    File output = new File ("output.txt");

    try {
        Scanner myReader = new Scanner (Lyrics);
        try {
            FileWriter FBI = new FileWriter(output);
            while (myReader.hasnextLine()) {
                FBI.write(myReader.nextLine());
                FBI.write("\n");
            }
            FBI.close();
        }catch (IOException e) {}
        myReader.close();
    }catch (FileNotFoundException e) {}
  }
}

Lyrics.txt：

I could never find the right way to tell you
Have you noticed I've been gone
Cause I left behind the home that you made me
But I will carry it along

输出：

I could never find the right way to tell you
Have you noticed I've been gone
Cause I left behind the home that you made me
But I will carry it along
***invisible new line here

要求的锻炼结果：

I could never find the right way to tell you

Have you noticed I've been gone

Cause I left behind the home that you made me

But I will carry it along
***invisible new line here

尝试添加新的代码行并找出问题所在之后，我简单地修复了更改代码行的问题，即在

FBI.write("\n\n");

但是我仍然感到困惑，为什么我必须添加双换行（\ n \ n）来写句子，然后再换行...