将行添加到文件中

with open('file.txt', 'a') as file:
    file.write('This is a new line.\n')

import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> lines = List.of("This is a new line.");
        try {
            Files.write(Paths.get("file.txt"), lines.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

const fs = require('fs');

fs.appendFile('file.txt', 'This is a new line.\n', (err) => {
    if (err) throw err;
    console.log('The line has been added.');
});

using System;
using System.IO;

class Program {
    static void Main() {
        string line = "This is a new line.";
        File.AppendAllText("file.txt", line + Environment.NewLine);
    }
}