[[Set the layout for the frames content >> Create your controls, configure them, setup any event listeners, and add them to the frame >> set the frames size and default window closing behavior (Can use a main method in the class itself to create an instance and display it, or have a separate test class to do that.)]]

Create an application with a GUI containing a JButton which you save in an instance variable. Make your application class implement the ActionListener interface and register itself as an ActionListener for the button. Your actionPerformed handler can simply print the event for now.

just this part if possible >>Add another JButton with text label Off to your GUI and register the application class as an ActionListener. Modify the code for the event handler so that when the second button is clicked it changes the text of the button itself Off to On or vice versa. Hint: Use EventObject.getSource() to find out which object generated the event, and compare it to your instance variables to figure out what to do.