FULL PRODUCT VERSION :
1.8.0_45

ADDITIONAL OS VERSION INFORMATION :
OS X Yosemite version 10.10.4

EXTRA RELEVANT SYSTEM CONFIGURATION :
trackpad with setting "tap for a clic"

A DESCRIPTION OF THE PROBLEM :
If you use some Swing component (perhaps in JavaFX too), perhaps like a JComboBox and you clic for a selection, you become a "java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location".

After some hours of test, i see that comes only if you are setting "a tap make a clic" on global trackpad setting and you make tap on your java application. If you clic (not a tap) it's ok (with a true mouse, it's ok too). For me is clearly a bug in Java 8 (perhaps with 7 too).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Use a JComboBox with some elements in model in a small Java Swing application
2. Tap for a clic when you select an entry
3. See the error message

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No IllegalComponentStateException with a tap for a clic in Mac OS.
ACTUAL -
IllegalComponentStateException

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2054)
at java.awt.Component.getLocationOnScreen(Component.java:2028)
at sun.lwawt.macosx.CAccessibility$23.call(CAccessibility.java:395)
at sun.lwawt.macosx.CAccessibility$23.call(CAccessibility.java:393)
at sun.lwawt.macosx.LWCToolkit$CallableWrapper.run(LWCToolkit.java:598)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
at java.awt.EventQueue.access$400(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:697)
at java.awt.EventQueue$3.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:719)
at java.awt.EventQueue$4.run(EventQueue.java:717)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
See example under :
http://stackoverflow.com/questions/27016400/error-illegalcomponentstateexception-when-pressing-jmenuitem-in-java-swing-os
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
clic with the trackpad or use a mouse