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1) Create some form (JFrame). 2) add JButton there 3) Generate actionPerformed (...) handler (popup menu on JButton > Events > Actions > ...) 4) switch to text editor put cursor on xxxactionPerformed method name 5) try to rename method (Ctrl+R) > It looks like that rename feature is supported, but new name is not used. We should fix rename action, or it should be disabled in this case, or some message should inform user, that rename is not supported in this case.
This is one of known limitations of refactoring support in GUI builder. See issue 106831 and section 'Rename event handler method in the form class' in http://wiki.netbeans.org/GUIBuilderRefactoring *** This issue has been marked as a duplicate of 106831 ***