<AWT Dev> [7u6] Review request for 7181027: [macosx] Unable to use headless mode

David Holmes david.holmes at oracle.com
Wed Jul 11 18:15:31 PDT 2012

On 11/07/2012 11:46 PM, Leonid Romanov wrote:
> Hi,
> Please review a fix for 7181027: [macosx] Unable to use headless mode. The problem here is that for headless mode  "java.awt.graphicsenv" system property should be CGraphicsEnvironment because the way GraphicsEnvironment.createGE() method works: it first instantiates GraphicsEnvironment instance and then wraps it with HeadlessGraphicsEnvironment if in headless mode. This means twe can't use java.awt.graphicsenv property to determine whether we are in headless mode or not. So, I've replaced it with a toolkit check: if it's HToolkit, then we are in headless.

sun.awt.HToolkit was introduced for use by SE-Embedded's reduced 
headless JRE. How did the OSX port end up using it ???

Headless handling on OSX should be like regular headless on Linux, Solaris.


> Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7181027
> Webrev: http://cr.openjdk.java.net/~leonidr/7181027/webrev.00/
> Thanks,
> Leonid.

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