Thread: Source from a JComboBox

So I have a JComboBox and a button. I want the user to select an option from the combo box, then click the delete button which will call the action listener:

ActionListener DeleteVert = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JComboBox cb = (JComboBox) e.getSource();
		        String Selection = (String)cb.getSelectedItem();
		        System.out.println(Selection);
			}
        };
 
        Delete.addActionListener(DeleteVert);

When I try to click the button it throws an exception on the line:
JComboBox cb = (JComboBox) e.getSource();

The exception says something about an unknown source. Anyone got any ideas whats wrong?

Perhaps the source was not a JComboBox? What does the error message say?

I changed it so the action listener is set to the combo box instead of the button and it prints when I click on one of the options in the drop down box, but I wanted it so that you select the option and then press the button for it to run.

Any idea how I would do that instead?