@Override
	public void actionPerformed(ActionEvent e) {
		if (e.getSource().equals(addButton)) {
			if (source.getSelectedValue() != null) {
				String str = (String) source.getSelectedValue();
				if (str != null) {
					destModel.addElement(str);
					dest.setSelectedIndex(0);
					sourceModel.removeElement(str);
					source.setSelectedIndex(0);
				}
			}
		}
		if (e.getSource().equals(removeButton)) {
			if (dest.getSelectedValue() != null) {
				String str = (String) dest.getSelectedValue();
				if (str != null) {

					sourceModel.addElement(str);
					source.setSelectedIndex(0);
					destModel.removeElement(str);
					dest.setSelectedIndex(0);
				}
			}
		}
	}