[RESOLVED] clear text in a file

i need to know how to find one line in a file and delete that line only.

like if i type "text" in a textfield then i click a button and it finds the line in a file where it says "text" and after that clears only that line.

This code should do it:

Code:

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import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Test {
        public static void main(final String[] args) throws IOException {
                final Scanner scanner = new Scanner(System.in);
                String filePath = null;
                do {
                        filePath = scanner.nextLine();
                } while (new File(filePath).exists());
                final String lineToDelete = scanner.nextLine();
                final BufferedReader reader = new BufferedReader(new FileReader(
                                filePath));
                final StringBuffer sb = new StringBuffer();
                while (reader.ready()) {
                        final String currentLine = reader.readLine();
                        if (!currentLine.equals(lineToDelete)) {
                                sb.append(reader.readLine());
                                sb.append(System.getProperty("line.separator"));
                        }
                }
                reader.close();
                final FileWriter writer = new FileWriter(filePath);
                writer.write(sb.toString());
                writer.close();
        }
}

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