import javax.swing.JPanel;
import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.BorderFactory;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;


class ArdoiseTouches extends JPanel {
  ArdoiseTouches() {
      setPreferredSize(new Dimension(100, 100));
      setForeground(Color.RED);
    }

  public  void paintComponent(Graphics g) {
    super.paintComponent(g);
    g.fillOval(10, 10, 80, 80);
  }
} 

class Touches extends JPanel implements KeyListener, MouseListener {
  ArdoiseTouches ardoise = new ArdoiseTouches();
  JLabel labelR = new JLabel(" touche r : ovale rouge");
  JLabel labelB = new JLabel(" touche b : ovale bleu");
  JLabel labelV = new JLabel(" touche v : ovale vert");
  JLabel labelE = new JLabel(" touche e : effacer");
  JPanel indications = new JPanel();
  
  Touches() {
      indications.setLayout(new GridLayout(4, 1));
      indications.add(labelR);
      indications.add(labelB);
      indications.add(labelV);
      indications.add(labelE);
      add(indications, BorderLayout.NORTH);
      add(ardoise, BorderLayout.CENTER);
      addKeyListener (this);
      addMouseListener (this);
      setBorder(BorderFactory.createLineBorder(Color.BLACK));
    }
    public void mouseEntered(MouseEvent evt) {
	requestFocus();
    }
    public void mouseExited(MouseEvent evt) {}
    public void mouseReleased(MouseEvent evt) {}
    public void mouseClicked(MouseEvent evt) {}
    public void mousePressed(MouseEvent evt) {}


  public void keyPressed(KeyEvent evt){}

  public void keyReleased(KeyEvent evt){}  

  public void keyTyped(KeyEvent evt) {
      if (evt.getKeyChar() == 'r')
	ardoise.setForeground(Color.RED);
      else if (evt.getKeyChar() == 'b')
	ardoise.setForeground(Color.BLUE);
      else if (evt.getKeyChar() == 'v')
	ardoise.setForeground(Color.GREEN);
      else if (evt.getKeyChar() == 'e')
	ardoise.setForeground(ardoise.getBackground());
      ardoise.repaint();
    }
}

public class TouchesApplet extends JApplet { 
    public void init() {
	setContentPane(new Touches());
    }
}