AWTEventMask

An AWTEvent type a JLayer observes events of (COMPONENT_EVENT_MASK, FOCUS_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, INPUT_METHOD_EVENT_MASK, HIERARCHY_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK). The mask is a bit mask: combine the types a layer watches using the bitwise or.