如何在文本文件中按行号替换特定行？

def replace_line(file_path, line_number, new_line):
    with open(file_path, 'r') as file:
        lines = file.readlines()

    lines[line_number - 1] = new_line + '\n'

    with open(file_path, 'w') as file:
        file.writelines(lines)

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class ReplaceLine {
    public static void main(String[] args) {
        String filePath = "example.txt";
        int lineNumber = 3;
        String newLine = "This is the new line.";

        replaceLine(filePath, lineNumber, newLine);
    }

    public static void replaceLine(String filePath, int lineNumber, String newLine) {
        try (BufferedReader reader = new BufferedReader(new FileReader(filePath));
             BufferedWriter writer = new BufferedWriter(new FileWriter(filePath))) {

            String line;
            int currentLineNumber = 1;

            while ((line = reader.readLine()) != null) {
                if (currentLineNumber == lineNumber) {
                    writer.write(newLine);
                } else {
                    writer.write(line);
                }
                writer.newLine();
                currentLineNumber++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

const fs = require('fs');

function replaceLine(filePath, lineNumber, newLine) {
    const lines = fs.readFileSync(filePath, 'utf-8').split('\n');
    lines[lineNumber - 1] = newLine;
    fs.writeFileSync(filePath, lines.join('\n'));
}