import javax.sound.midi.*;
import javax.swing.*;
import java.awt.event.*;
public class Noodirakend2 extends JApplet implements ActionListener{
  public void init(){
    JButton b=new JButton("Mängi");
    getContentPane().add(b);
    b.addActionListener(this);
  }

  public void actionPerformed(ActionEvent e){
   try{
    Synthesizer synthesizer=MidiSystem.getSynthesizer();
    synthesizer.open();
    MidiChannel kanal=synthesizer.getChannels()[0]; //kanal 0;
    for(int i=40; i<100; i++){
      kanal.noteOn(i, 60);
      Thread.sleep(200);
      kanal.noteOff(i);
    }
    synthesizer.close();
   }catch(Exception ex){
     ex.printStackTrace();
   }
  }
}