如何在现有文件中追加新行？

Question

我应该如何在添加完我应该添加的内容后添加一个新行。我有以下代码：

        try{
            String textToAppend = question+userInput+","+typeOfAnswer;
            Files.write(Paths.get("save.txt"), textToAppend.getBytes(), StandardOpenOption.APPEND);
        }
        catch (NoSuchFileException e){

        }
        catch(IOException e){

        }

Example: question: By what initials was Franklin Roosevelt better known? userInput: RED typeOfAnswer will be wrong: wrong

我从一个文件中得到我的问题和真实答案，然后我将真实答案与 userInput 进行比较，看看 typeOfAnswer 是否是 wrong/right。我想在一个文件中输出问题、userInput 和 typeOfAnswer，但我有多个问题，因此我想在一个新行上输出每个最终结果。

Answer 1

如评论：

textToAppend += System.lineSeparator();

证明

import java.nio.file.*;

public class Test {
    public static void main(String[] args) throws Exception {
        save("By what initials was Franklin Roosevelt better known?", "RED", "wrong");
        save("Which number president was Franklin Roosevelt?", "RED", "wrong");
    }
    public static void save(String question, String userInput, String typeOfAnswer) throws Exception {
        String textToAppend = question + userInput + "," + typeOfAnswer;
        textToAppend += System.lineSeparator();
        Files.write(Paths.get("save.txt"), textToAppend.getBytes(), StandardOpenOption.APPEND, StandardOpenOption.CREATE);
    }
}

文件内容

By what initials was Franklin Roosevelt better known?RED,wrong
Which number president was Franklin Roosevelt?RED,wrong

运行程序3次后的文件内容

By what initials was Franklin Roosevelt better known?RED,wrong
Which number president was Franklin Roosevelt?RED,wrong
By what initials was Franklin Roosevelt better known?RED,wrong
Which number president was Franklin Roosevelt?RED,wrong
By what initials was Franklin Roosevelt better known?RED,wrong
Which number president was Franklin Roosevelt?RED,wrong

如何在现有文件中追加新行？

How to append new line in an existing file?

java

newline

file

printstream