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

public class FileRecorder {

   private AudioFormat audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 44100.0F, 16, 2, 4, 44100.0F, false);
   //private AudioFormat audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 8000.0F, 16, 1, 2, 8000.0F, false);
   private AudioFileFormat.Type targetType = AudioFileFormat.Type.AU;
   private TargetDataLine targetDataLine;
   private AudioInputStream audioInputStream;
   private File file;
   private boolean recording;

   public static void main(String[] args) {
      new FileRecorder(args[0]);
   }

   public FileRecorder(String fileName) {
      file = new File(fileName);
      DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat);
      try {
         targetDataLine = (TargetDataLine)AudioSystem.getLine(info);
         targetDataLine.open(audioFormat);
      } catch(LineUnavailableException e) {
         e.printStackTrace();
         System.exit(1);
      }
      audioInputStream = new AudioInputStream(targetDataLine);
      record();
   }

   public void record() {
      System.out.println("Press ENTER to start the recording!");
      try { System.in.read(); } catch(IOException e) {}
      targetDataLine.start();
      Recorder recorder = new Recorder();
      recorder.start();
      System.out.println("Recording ...");

      System.out.println("Press ENTER to stop the recording.");
      try { System.in.read(); System.in.read(); } catch(IOException e) {}
      targetDataLine.stop();
      targetDataLine.close();
      System.out.println("Recording stopped.");
      System.exit(0);
   }

   public class Recorder extends Thread {
      public void run() {
         try {
            AudioSystem.write(audioInputStream, targetType, file);
         } catch(IOException e) {
            e.printStackTrace();
         }
      }
   }
}