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booking seats

ravindra janapreddy
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When I run the modify method , I found that the # of seats is reduced twice.
I think it has to do with the public void valueChanged(ListSelectionEvent e) being called twice . How could I avoid the method being called twice?
I have tried to used the following code but still , It doesn't seem to work.
JTable table = new JTable(model);
Where could I be going wrong ?
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