import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.sound.midi.*;

public class noot extends Panel implements ActionListener, AdjustmentListener{
  Scrollbar sbkorgus=new Scrollbar(Scrollbar.HORIZONTAL, 50, 0, 0, 100);
  Scrollbar sbvaljus=new Scrollbar(Scrollbar.HORIZONTAL, 50, 0, 0, 100);
  Scrollbar sbkordus=new Scrollbar(Scrollbar.HORIZONTAL, 10, 0, 1, 50);
  Scrollbar sbtempo=new Scrollbar(Scrollbar.HORIZONTAL, 1000, 0, 100, 10000);
  Label lakorgus=new Label("Kõrgus:     ");
  Label lavaljus=new Label("Valjus:     ");
  Label lakordus=new Label("Kordus:     ");
  Label latempo=new Label("Tempo:     ");
  Button kuula=new Button("Kuula");
  int korgus;
  int valjus;
  int kordus;
  int tempo;

  public noot(){
    Panel ylapaneel=new Panel();
    ylapaneel.add(lakorgus);
    ylapaneel.add(sbkorgus);
    ylapaneel.add(lavaljus);
    ylapaneel.add(sbvaljus);
    ylapaneel.add(lakordus);
    ylapaneel.add(sbkordus);
    ylapaneel.add(latempo);
    ylapaneel.add(sbtempo);
    Panel alapaneel=new Panel();
    alapaneel.add(kuula);
    
    setLayout(new BorderLayout());
    add(ylapaneel, BorderLayout.NORTH);
    add(alapaneel, BorderLayout.SOUTH);
    kuula.addActionListener(this);
    sbkorgus.addAdjustmentListener(this);
    sbvaljus.addAdjustmentListener(this);
    sbkordus.addAdjustmentListener(this);
    sbtempo.addAdjustmentListener(this);
  }

  public void actionPerformed(ActionEvent e){
    try{
      Synthesizer synthesizer=MidiSystem.getSynthesizer();
      synthesizer.open();
      MidiChannel kanal=synthesizer.getChannels()[0]; //kanal 0;
      for(int i=0; i<kordus; i++){
        kanal.noteOn(korgus, valjus);
        Thread.sleep(tempo);
        kanal.noteOff(korgus);
      }
    }catch(Exception ex){ex.printStackTrace();  System.out.println(ex);  }
  }

  public void adjustmentValueChanged(AdjustmentEvent e){
    lakorgus.setText("Kõrgus: "+sbkorgus.getValue());
    korgus=sbkorgus.getValue();
    lavaljus.setText("Valjus: "+sbvaljus.getValue());
    valjus=sbvaljus.getValue();
    lakordus.setText("Kordus: "+sbkordus.getValue());
    kordus=sbkordus.getValue();
    latempo.setText("Tempo: "+sbtempo.getValue());
    tempo=sbtempo.getValue();
  }

  public static void main(String[] argumendid){
    Frame f=new Frame("Väike MIDI süntesaator");
    f.add(new noot());
    f.setSize(700, 100);
    f.setVisible(true);
    f.addWindowListener(new Raamikuular());
  }
}

class Raamikuular extends WindowAdapter{
  public void windowClosing(WindowEvent e){
    System.out.println(" ");
    System.exit(0);
  }
}