Bug ID: JDK-6862560 Frame is becoming undecorated when setting its background to alpha value less then 255

JDK-6862560 : Frame is becoming undecorated when setting its background to alpha value less then 255

Type: Bug
Component: client-libs
Sub-Component: java.awt
Affected Version: 7

Priority: P2
Status: Closed
Resolution: Not an Issue
OS: windows,windows_vista
CPU: x86

Submitted: 2009-07-21
Updated: 2011-01-19
Resolved: 2010-11-25

Related Reports

Duplicate :	JDK-6987848 - Setting shape and translucent background to JFrame makes it border and title invisible
Relates :	JDK-6725365 - Per-pixel transparency must only be available for undecorated frames/windows
Relates :	JDK-6990924 - Applying shape to window leaves its border unaffected on Solaris
Relates :	JDK-6993784 - Clarification to shaped/translucent windows specification is required
Relates :	JDK-6987849 - Border and title of JFrame are shown but not clickable for translucency + per-pixel translucency

Description

Frame is becoming undecorated when I am setting setBackground() method with a color having aplha value less then 255. I am not making the frame as undecorated in the code.
This I reproduced on Windows XP with Jkd7b66 pit build.
I could also reproduce this on 7b61 build.

Steps to reproduce:
1. Run the attached testcase (TestOpacity.java)
java TestOpacity
2. If you can see the frame is undecorated the bug is reproduced.