Graphic Java™ 1.2, Volume I: AWT, Third Edition

Event Modifier Constants

In addition to an id field, each java.awt.Event also contains a modifier field that provides additional information about the event. For example, you might want to know which key or which mouse button triggered an event. The Event class defines a handful of constants that provide such information. Table 8-6 lists the modifier constants. We'll show how to use these later in this chapter, but it's useful to have them handy for reference.

Table 8-6. Event Modifiers

Event Modifier Constant	Type	Meaning
ALT_MASK	Keyboard	ALT key is down.
ALT_MASK	Mouse Button	Button 2 is pressed.
CTRL_MASK	Keyboard	CONTROL key is down.
DOWN	Function Key	DOWN key is pressed.
END	Function Key	END key is pressed.
F1 - F12	Function Key	FUNCTION ...