getting results from a jdialog

[rabbithole]

Hi guys,

I have a jframe with (among other things) a button: when clicking on this button, a jdialog pops up with a combobox and a button (to confirm selection).

When pressing on the button in the jframe, this happens:

JDialog choose = new JDialog();
JComboBox cmbSubject = new JComboBox();
JButton btnConfirm = new JButton();
choose.add(cmbSubject);
choose.add(btnConfirm);
choose.setVisible(true);

How can I get the selected Object from the combobox back to the original jframe? I can't figure this out