Exception in thread “AWT-EventQueue-0” java.lang.ClassCastException: javax.swing.JTable

Question

I have a code which when run generates a table in swing form which contains a set of checkboxes which can be selected or unselected

When I click on the Check All ta

Answer 1

You are casting the source of the event to a JTableHeader:

JTableHeader header = (JTableHeader) (e.getSource());

and the source is a JTable when you click at a cell. I would have two different listeners for the header and the cell selection or you can do a hack by checking event.getSource() instanceof ... in your mouse-click-listener.

Answer 2

On line 152: JTableHeader header = (JTableHeader)(e.getSource()); you are assuming the event is on the table header. You need to check event source's class to see if it's on the header or an individual checkbox.