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Clickable jtable header?

 
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So the situation is this. I build a jtable dynamically from data I grabbed out of a database. Now I want to have the header tags do a sort(sorting being another problem) when a column is clicked. I do not know how to tell which column is clicked. Here is the snippet of code which I was working on for the eventListener

The print statement returns -1 each time which means that none of the 9 columns were selected. Not sure how to do this. Please help and thanks.
 
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I think this topic is very nicely covered in:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#sorting

BTW, we have a forum here, which is called Swing/AWT/SWT/JFace.

P.
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