StringInTextFile.java

import java.io.*;

public class StringInTextFile {
 public static void main(String[] args) {
 String filePath = "path_to_your_file.txt";
 String searchString = "your_search_string";

 try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
 String line;
 int lineNumber = 1;

 while ((line = br.readLine()) != null) {
 if (line.contains(searchString)) {
 System.out.println("Line " + lineNumber + ": " + line);
 }
 lineNumber++;
 }
 } catch (IOException e) {
 System.out.println("An error occurred.");
 }
 }
}