JComboBox - Set the selection programatically at runtime

[Pradeep Kadambar]

I am using an Editable JComboBox containing predefined entries. If the user types in a new entry add it. If it is empty then show a warning that it cannot be empty and set it to the previous selected string.

I tried this in ActionListner. Every time the comboChanged event is triggered I check for emty string if not then store the selectedItem as oldString. So on comboEdited I write

  
JOptionPane.showMessageDialog(null,
      "You cannot keep the the type empty",
      "Sample App",
      JOptionPane.WARNING_MESSAGE);
System.out.println("SET TO OLD : " + oldSelection);
combo.setSelectedItem(oldSelection);

Please suggest a solution :roll:

[Don Kiddick]

What's the problem ?