import java.applet.*;
import java.awt.*;
import java.awt.event.*;
//import java.util.Stack;

public class SillyApplet extends Applet implements ActionListener,
  ItemListener {
  private Button stopAndGo = new Button("stop");
  private Checkbox mood = new Checkbox("happy");
  private TextField dataValue = new TextField("", 10);
  private Label result;

  public void init() {
    add(stopAndGo);
    stopAndGo.addActionListener(this);
    add(dataValue);
    dataValue.addActionListener(this);
    add(mood);
    mood.addItemListener(this);
    result = new Label("______________________________");
  }

  public void actionPerformed(ActionEvent e) {
      if (e.getSource() == stopAndGo)
        if (stopAndGo.getLabel().equals("stop"))
          stopAndGo.setLabel("go");
        else
          stopAndGo.setLabel("stop");
      else if (e.getSource() == dataValue)
         try {
            int num = (new Integer(dataValue.getText())).intValue();
            dataValue.setText("" + 2 * num);
         } catch (NumberFormatException p) {
            System.out.println("Bad number in datavalue");
         }
  }

  public void itemStateChanged(ItemEvent e) {
    if (mood.getState())
      result.setText("Call home");
    else
      result.setText("take a nap - you'll feel better");
  }


}