扩展Java Swing / AWT计划

I've written a small Swing program that draws a head and when a JCheckBox instance is selected/unselected by the user a hat is drawn or removed from on top of the head. I'm having some trouble taking the next step with this program -- I'd like to add a boolean field to the Head class that causes this component to listen to mouse events with a MouseListener. From there, I'd like to use two methods to set this field to true/false and render the remaining three methods lame ducks. Also, how would I change the paintComponent method so that if the boolean value is true the object is drawn with open eyes, and if it's false, the head is drawn with the eyes closed? Please provide any advice you have. Many thanks! I've written a small Swing program that draws a