Simple microphone that replays what is recorded

MicStuff.java

import javax.sound.sampled.*;
import java.io.*;
import java.util.Scanner;

public class MicStuff {
    public static void main(String[] args) throws LineUnavailableException, IOException, UnsupportedAudioFileException {
        AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                44100,
                16,
                2,
                4,
                44100,
                false);
        TargetDataLine tdl = AudioSystem.getTargetDataLine(format);
        tdl.open();
        tdl.start();
        File out = File.createTempFile("prefix", "suffix");
        out.deleteOnExit();
        Thread thread = new Thread(new Thread(() -> {
            try {
                AudioInputStream ais = new AudioInputStream(tdl);
                AudioSystem.write(ais, AudioFileFormat.Type.WAVE, out);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }));
        thread.start();
        try {
            Thread.sleep(2500);
            tdl.stop();
            tdl.close();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Clip clip = AudioSystem.getClip();
        AudioInputStream ais = AudioSystem.getAudioInputStream(out);
        clip.open(ais);
        clip.start();
        Scanner scan = new Scanner(System.in);
        while(true) {
           int num = scan.nextInt();
           if (num == 0) {
               clip.setFramePosition(0);
               if (!clip.isActive()) {
                   clip.start();
               }
           } else {
               break;
           }
        }
    }
}