FULL PRODUCT VERSION :
java version "1.6.0_01"
Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
Java HotSpot(TM) Client VM (build 1.6.0_01-b06, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows XP

A DESCRIPTION OF THE PROBLEM :
The window of the installer (jdk-6u1-fcs-src-b06-jrl-14_mar_2007.jar, jdk-6u2-ea-src-b02-jrl-12_apr_2007.jar, and jdk-7-ea-src-b12-jrl-06_may_2007.jar) is not updated. We can not cancel the installation.

This fix may cause this phenomenon. (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6373352) "A long running task, such as network io or computational intensive processing, executed on the event dispatching thread blocks the event dispatching thread from dispatching any other events. While the event dispatching thread is blocked the application is completely unresponsive to user input. Refer to SwingWorker for the preferred way to do such processing when working with Swing." (http://java.sun.com/javase/6/docs/api/javax/swing/package-summary.html)

P.S. The window of the installer (jdk-1_5_0_11-fcs-src-b03-jrl-15_dec_2006.jar, jdk-6u2-ea-bin-b02-windows-i586-debug-12_apr_2007.jar, and jdk-7-ea-bin-b12-windows-i586-debug-06_may_2007.jar) is updated. We can cancel the installation.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM:
1. Double click jdk-6u1-fcs-src-b06-jrl-14_mar_2007.jar. "License
Agreement" window is appeared.
2. Push ACCEPT button. "Select install directory" window is appeared.
3. Push INSTALL button. "Installing..." window is appeared. But, the
progress bar and "Cancel" button is not drawn in the window. You can
not push "Cancel" button to cancel the installation.
4. "Install Completed" window is appeared. The progress bar and
"Cancel" button is drawn in "Installing..." window.


REPRODUCIBILITY :
This bug can be reproduced always.