I am using Netbeans to develop a Ruby on Rails application. Unfortunately, I have a problem with it.
Sometimes the keyboard stop working and I can not input code in the text editor.
Also the keyboard short cut specific to netbeans stop working as well (such as ctrl + s)
Nevertheless, the Ubuntu keyboard short cut still work (alt + tab …)
The only solution I found is to maximize/unmaximize the window of the text editor or switch tab.
This probably isn’t a proper SO question, but have you tried switching from the community version of Java to the Sun version (or the other way around)?
https://help.ubuntu.com/community/Java