How to Close Combobox.

Hello happy ppl.

Im stuck, how can I close the ComboBox after I have selected an project. It opens the class OpenOrder as it shoud, but the combobox is left open behind the new frame.

Code:

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public OpenComboBox() {
    String[] projectNames = { "2004", "2003", "2005" };
    JComboBox project = new JComboBox(projectNames);
    project.setSelectedIndex(2);
    project.addActionListener(this);
    add(project, BorderLayout.PAGE_START);
    setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
}
public void actionPerformed(ActionEvent e) {
      JComboBox cb = (JComboBox)e.getSource();
      String projectNames = (String)cb.getSelectedItem();
      if (projectNames.equals("2004")) {
        openOrder.OpenOrder();
        frame.setVisible(false); <------------
        frame.dispose(); <-------------------
      }
    }

void comboFrame()  {
    frame.setPreferredSize(new Dimension(200,100));
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLocationRelativeTo(null);
    JComponent newContentPane = new OpenComboBox();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);
}

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I have tryed diffrent things in actionPerformed. last thing i tryed was to do a frame.dispose();

Would be happy if someone can point me in the rigth direction.

Best Regards / Ocean

Use SwingUtilities.invokeLater. That should help.

Code:

---

SwingUtilities.invokeLater(new Runnable() {
        public void run() {
                openOrder.OpenOrder();
        }
});

---

Hm how can that close my ComboFrame ?

Huh?! You've asked how to close the ComboBox.

Sorry if Im bad at explaning. Yes. When i open a new project from MainClass, ComboFrame calls and i can select project from the list. When i selected a project a new Frame appears. But the comboFrame is still in the background. :)