Add component to JPanel

Question

Hello everyone,
I have a JComboBox, and when i select an Option i would like to add a new component to the JPanel (just below the JComboBox). This is what i have at the moment, but i must be doing something wrong because it does nothing.
String[] choices = { "Choose option", "Option 1", "Option 2", "Option 3", "Option 4", "Option 5" };
                   mainPanelComponent5 = new JComboBox(choices );
                   mainPanelComponent5.setBounds(100, 70, 150, 20);
                   mainPanelComponent5.addItemListener(new ItemListener() {
                      public void itemStateChanged(ItemEvent e) {
                          if (e.getStateChange() == ItemEvent.SELECTED) {
                               JLabel compId = new JLabel("TEST");
                               compId.setBounds(210, 70, 250, 20);
                               mainPanel.add(compId);
                  });Any help? thanks in advance

Answer 1

mainPanel.revalidate();Thank you, it works