Learning Java

Event Summary

Table 13.1 and Table 13.2 summarize the commonly used Swing events, which Swing components fire them, and the methods of the listener interfaces that receive them. The events and listeners are divided between the java.awt.event and javax.swing.event packages.

In Swing, a component’s model and view are distinct. Strictly speaking, components don’t fire events; models do. When you press a JButton, for example, it’s actually the button’s data model that fires an ActionEvent, not the button itself. But JButton has a convenience method for registering ActionListeners; this methods passes its argument through to register the listener with the button model. In many cases (as with JButtons), you don’t have to deal with the data model separately from the view, so we can speak loosely of the component itself firing the events.

Table 13-1. Swing Component and Container Events

Event	Fired by	Listener Interface	Handler Method
java.awt.event.ComponentEvent	All components	ComponentListener	component-Resized( )
			componentMoved()
			componentShown()
			componentHidden( )
java.awt.event.FocusEvent	All components	FocusListener	focusGained( )
			focusLost()
java.awt.event.KeyEvent	All components	KeyListener	keyTyped( )
			keyPressed( )
			keyReleased( )
java.awt.event.MouseEvent	All components	MouseListener	mouseClicked( )
			mousePressed( )
			mouseReleased( )
			mouseEntered( )
			mouseExited( )
		MouseMotionListener ...