Creating New File types question.

[GodspeedPR]

Im working on netbeans IDE and I already made a new file type with extension .ikl
what i wanna now is after I create it. How can I create a new file of type ikl when the user click on a button for example. Thank you!!

[Norm]

How can I create a new file of type ikl

There are no restrictions in java on what file extension you use when you create a file.

when the user click on a button

You would use an action listener added to the button. When the button is clicked, the listener is called and you can then do whatever you want.
Go to this site and Search for Listener: The Really Big Index
for details on how to write a listener