ADDITIONAL SYSTEM INFORMATION :
MacOS only.
Already fixed via JDK-8214046 for Java 11 and newer.


A DESCRIPTION OF THE PROBLEM :
Frame/ JFrame with option setUndecorated(true) and setState(Frame.ICONIFIED) does not iconify the window, hence window state event is not produced.

A backport patch is available at https://github.com/openjdk/jdk8u-dev/pull/341

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
See https://bugs.openjdk.org/browse/JDK-8214046 for example code. The backport patch in https://github.com/openjdk/jdk8u-dev/pull/341 also contains code to reproduce the issue on MacOS.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A Frame/JFrame with option setUndecorated(true) and setState(Frame.ICONIFIED) or setExtendedState(Frame.ICONIFIED) should be minified.
ACTUAL -
The Frame isn't minified.

CUSTOMER SUBMITTED WORKAROUND :
None.

FREQUENCY : always