Recording audio from microphone and saving to file

Shared Code
#1 

import java.io.File;
import java.util.UUID;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.TargetDataLine;
import javax.swing.JOptionPane;

public class Recorder {
	TargetDataLine line;
	AudioFormat a = new AudioFormat(16000, 8, 2, true, true);

	public void start() {
		try {
			DataLine.Info info = new DataLine.Info(TargetDataLine.class, a);
			line = (TargetDataLine) AudioSystem.getLine(info);
			line.open(a);
			line.start();
			AudioInputStream ais = new AudioInputStream(line);
			AudioSystem.write(ais, AudioFileFormat.Type.WAVE,
					new File(UUID.randomUUID() + ".wav"));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		new Recorder();
	}

	public Recorder() {
		Thread stopper = new Thread(new Runnable() {
			public void run() {
				try {
					Thread.sleep(Integer.parseInt(JOptionPane
							.showInputDialog("How long do you want to record (seconds)")) * 1000);
				} catch (InterruptedException ex) {
					ex.printStackTrace();
				}
				line.stop();
				line.close();
				JOptionPane.showMessageDialog(null, "Finished.");
			}
		});
		stopper.start();
		start();
	}
}

It’s pretty straight forward. It writes to a file in the directory where you launched it with a cryptic looking filename (as a result of using UUID.randomUUID()).

#2

You should include your import statements so it is clear what classes you are using.

Also, for any libraries used, state the library version.

#3

Fixed.