Strange bug in Windows 7 about java JDialog

whenever a JDialog shows up, it will change halfwidth mode to fullwidth mode

language setting

http://i.imgur.com/rLB0tcd.jpg

Before the JDialog shows up

http://i.imgur.com/PiebmpQ.jpg

After the JDialog shows up

http://i.imgur.com/5FCHS91.jpg

I find a similar question in stackoverflow, but the replies can't solve the problem.

http://stackoverflow.com/questions/16774709/automatic-toggling-of-character-width-by-windows-7-input-methods-in-java