Java在句子后加换行（为什么要双换行来解决它）？

问：

因此，当我尝试对 IOFile 进行一些练习时，我遇到了一个关于在 txt 文件上编写字符串的问题，特别是在新文件中的每个句子之后编写一个新行 （\n）。

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

请求练习的输出：

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

在尝试添加新代码行并试图找出问题所在之后，我只是修复了更改有关添加新行的代码行的问题

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

但是我很困惑为什么我必须添加一个双换行符 （\n\n） 来写句子，然后是换行符......