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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.");

}