import java.awt.*;
import java.awt.event.*;

public class CheckboxMenuItemTest
   extends Frame implements ActionListener, ItemListener 
{
  private static final String NEWLINE = System.getProperty("line.separator");
  private TextArea output;

  public CheckboxMenuItemTest() 
  {
    Menu m;
    MenuBar mb;
    CheckboxMenuItem mi;
        
    addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent e)
      {
        System.exit(0);
      }
    });


    setLayout(new BorderLayout());
    output = new TextArea(5, 30);
    output.setEditable(false);
    add("Center", output);

    mb = new MenuBar();
    setMenuBar(mb);

    m = new Menu("Menu");
    mb.add(m);
    mi = new CheckboxMenuItem("Checkbox");
    m.add(mi);

    m.addActionListener(this);
    mi.addItemListener(this);
  }

  public void actionPerformed(ActionEvent e) 
  {
    output.append("\"" + e.getActionCommand() + 
                  "\" action detected in menu labeled \"" + 
                  ((MenuItem)(e.getSource())).getLabel() + "\"." + NEWLINE);
  }

  public void itemStateChanged(ItemEvent e)
  {
    output.append("Item state change detected on item \"" + e.getItem() +
                  "\" (state is " + ((e.getStateChange() == ItemEvent.SELECTED)?                  "selected)." : "deselected).") + NEWLINE);
  }

  public static void main(String[] args) 
  {
    CheckboxMenuItemTest t = new CheckboxMenuItemTest();
    t.setSize(450, 200);
    t.setVisible(true);
  }
}