JDK-6833404 : java.awt.event.MouseEvent constructor should mention throwing HE in headless mode
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 7
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2009-04-23
  • Updated: 2012-03-22
  • Resolved: 2011-03-07
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

To download the current JDK release, click here.
JDK 7
7 b60Fixed
Related Reports
Relates :  
Relates :  
Relates :  
Relates :  
Relates :  
Description
For JDK7 the following code

public class Test {
    public static void main(String[] args) {
        new java.awt.event.MouseEvent(new javax.swing.JButton(), 0, 0, 0, 0,0,0,true, 0);
    }
}

if executed with -Djava.awt.headless=true 

will throw something like:

Exception in thread "main" java.lang.ExceptionInInitializerError
        at Test.main(Test.java:4)
Caused by: java.awt.HeadlessException
        at java.awt.MouseInfo.getNumberOfButtons(MouseInfo.java:122)
        at java.awt.event.MouseEvent.<clinit>(MouseEvent.java:420)
        ... 1 more

Comments
EVALUATION Current approach to 6799099 and 6834576 defects imposes that the MouseInfo.getNumberOfButtons() will be removed with some other internal API which doesn't require lock to perform.
18-05-2009

EVALUATION Caused by 6315717.
05-05-2009