CHAPTER 59 — Buttons and Action Events

We have been doing event-driven programing. The three parts of a GUI application are:

1. Components that make up the Graphical User Interface. <—— we've done this; this chapter will do more.
2. Listener methods that receive the events and respond to them. <—— we've done this; this chapter will do more.
3. Application methods that does useful work for the user. <—— we've not done this, yet.

Soon we will get to the third step, and you will actually write a full GUI application! But not yet. This chapter continues the discussion on how to add button components to a frame, and how the actionPerformed() can tell which button was clicked.

Chapter Topics:

• A Button's setActionCommand() method.
• An ActionEvent's getActionCommand() method.
• Using actionPerformed() with several buttons.