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Why is the keyboard locked when I use Netbeans on Linux?

I am using Netbeans to develop a Ruby on Rails application. Unfortunately, I have a problem with this.

Sometimes the keyboard stops working, and I cannot enter the code into a text editor. In addition, the netbeans-specific keyboard shortcut also stops working (e.g. ctrl + s) However, the Ubuntu keyboard shortcut still works (alt + tab ...)

The only solution I found was to maximize / non-maximize the text editor window or switch tab.

Does anyone have the same problem and know how to fix it?

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2 answers

This is probably not the right SO question, but were you trying to switch from the Java community version to the Sun version (or vice versa)?

https://help.ubuntu.com/community/Java

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This is not unsafe ... this is Java Swing:

This error message is ...

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6506617

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