import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class LogSearch {

public static List<String> searchLogFiles(String logFilePath, String searchPattern) {

List<String> results = new ArrayList<>();

Pattern pattern = Pattern.compile(searchPattern); // Compile the regex pattern

try (BufferedReader reader = new BufferedReader(new FileReader(logFilePath))) {

String line;

int lineNumber = 0;

while ((line = reader.readLine()) != null) {

lineNumber++;

Matcher matcher = pattern.matcher(line); // Match the pattern in the current line

if (matcher.find()) {

results.add("Line " + lineNumber + ": " + line); // Add the matching line to the results

}

}

} catch (IOException e) {

System.err.println("Error reading log file: " + e.getMessage());

}

return results;

}

public static void main(String[] args) {

if (args.length != 2) {

System.out.println("Usage: java LogSearch <logFilePath> <searchPattern>");

return;

}

String logFilePath = args[0];

String searchPattern = args[1];

List<String> results = searchLogFiles(logFilePath, searchPattern);

if (results.isEmpty()) {

System.out.println("No matches found.");

} else {

for (String result : results) {

System.out.println(result);

}

}

}

}