JdbComboBox и его Item-ы

  JPanel contentPane;
  
  public TestFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      init();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
 
  // Query emulation
  private Vector getSomeList() {
    Vector queryResult = new Vector();
    queryResult.add("Vasya");
    queryResult.add("Petya");
    queryResult.add("Sasha");
    queryResult.add("Masha");
    return queryResult;
  }
 
  // Component initialization
  private void init() throws Exception  {
    // Content pane initialization:
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(new BorderLayout());
    // Combobox initialization:
    JComboBox box = new JComboBox(getSomeList());
    // Adding combobox:
    contentPane.add(box, BorderLayout.NORTH);
    contentPane.validate();
    this.setSize(new Dimension(200, 100));
    this.setTitle("Test");
  }

    ordersCustomerNumberCombo.setBorder(BorderFactory.createLoweredBevelBorder());
    ordersCustomerNumberCombo.setPreferredSize(new Dimension(157, 23));
    ordersCustomerNumberCombo.setColumnName("CUSTOMER_NO");
    ordersCustomerNumberCombo.setDataSet(ordersQds);