Java在句子后添加换行符(为什么要双换行符来解决它)？

Question

所以，当我尝试做一些关于 IOFile 的练习时，我遇到了一个关于在 txt 文件上写入字符串的问题，特别是在新文件中的每个句子后面写入一个新行(\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) {}
  }
}

歌词.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

在尝试添加新的代码行并尝试找出问题所在后，我只是修复了更改有关在

中添加新行的代码行

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

但我仍然很困惑为什么我必须添加一个双换行符(\n\n)来写句子，然后换行......

Answer 1

\n 表示换行。

如果我的文字是

FooBar\nHello World

我会收到

FooBar
Hello World

由于 \n (换行)使我们的 HelloWorld 移动到新行，所以一切都是正确的。但是您想要两行新行(当前一行 + 一个空白行)而不是一行，则必须使用 \n\n。

输入

FooBar\n\nHello World

输出

FooBar

Hello World