如何在不使用Perl中的正则表达式的情况下在文件中找到特定行？

with open('file.txt', 'r') as file:
    for line in file:
        if '特定行' in line:
            print(line)

grep '特定行' file.txt

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

public class FindLine {
    public static void main(String[] args) {
        String fileName = "file.txt";
        String targetLine = "特定行";

        try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {
            String line;
            while ((line = br.readLine()) != null) {
                if (line.contains(targetLine)) {
                    System.out.println(line);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

using System;
using System.IO;

class FindLine
{
    static void Main()
    {
        string fileName = "file.txt";
        string targetLine = "特定行";

        using (StreamReader sr = new StreamReader(fileName))
        {
            string line;
            while ((line = sr.ReadLine()) != null)
            {
                if (line.Contains(targetLine))
                {
                    Console.WriteLine(line);
                }
            }
        }
    }
}

const fs = require('fs');
const targetLine = '特定行';

fs.readFile('file.txt', 'utf8', (err, data) => {
    if (err) {
        console.error(err);
        return;
    }
    const lines = data.split('\n');
    lines.forEach((line) => {
        if (line.includes(targetLine)) {
            console.log(line);
        }
    });
});