import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class CheckboxesDemo  extends JApplet implements ItemListener {

    private JCheckBox myCheckBox1, myCheckBox2;

    public void init() { 

	Container container = getContentPane();  
	//container.setLayout( new FlowLayout() ); 
	container.setLayout(null);	

	Box checkBox = new Box(BoxLayout.Y_AXIS);
	checkBox.setBounds(10,50,20,100);
	container.add(checkBox);
		
	myCheckBox1 = new JCheckBox( "My JCheckBox 1" );
	checkBox.add( myCheckBox1 );
	myCheckBox1.addItemListener( this ); 
	
	myCheckBox2 = new JCheckBox( "My JCheckBox 2", true );
	checkBox.add( myCheckBox2 );
	myCheckBox2.addItemListener( this ); 
	
    }

    public void itemStateChanged( ItemEvent event ) {
	if ( event.getSource() == myCheckBox1 ) {
	    if (event.getStateChange() == ItemEvent.SELECTED) {
		JOptionPane.showMessageDialog(null,"myCheckBox 1 selected");
	    }
	    else if (event.getStateChange() == ItemEvent.DESELECTED) {
		JOptionPane.showMessageDialog(null,"myCheckBox 1 deselected");
	    }
	}
	else if ( event.getSource() == myCheckBox2 ) {
	    if ( myCheckBox2.isSelected() ) {   //alternate way to see which event happened
		JOptionPane.showMessageDialog(null,"myCheckBox 2 selected");
	    }
	    else if ( ! myCheckBox2.isSelected() ) {
		JOptionPane.showMessageDialog(null,"myCheckBox 2 deselected");
	    }
	}
	

    } 

}