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

public class CheckboxGUI1 {
	public CheckboxGUI1 (){
		Frame frame = new Frame ("My GUI");
		frame.setSize(300,300);
		Checkbox checkbox = new Checkbox ("Tick me");
		CheckboxListener cbl = new CheckboxListener();
		checkbox.addItemListener(cbl);
		frame.add(checkbox);
		frame.setVisible(true);
	}

	public static void main (String args[]) {
		new CheckboxGUI1();
	}
}