I saw following GUI related issues with OpenJDK JDK for AIX:
* Non-focusable window gets input focus on AIX's CDE (dtwm)
  (DTWM/MWM does not have enough features for ICCCM)
* Java cannot detect AIX's Motif Window Manager (mwm)

Previously, this issue was handled by JDK-8212676.
JDK-8212676 handles only SystemColor setting on CDE.

Test instruction:
XWMTest1.java
1, Run XWMTest1 on AIX CDE
isCDE and isMotif were true
2. Run XWMTest1 with Motif Window Manager
All data was false

JFrameTest.java
1. Run JFrameTest on AIX CDE
2. 3 windows are displayed
3. Click inside of Non-Focusable window.
   (Don't click window frame)
4. Window should not be changed