How to load an enum populated ComboBox with no value selected

Question

On Netbeans, I have a jDialog with a jComboBox populated from values coming from a Java Enumeration. I need the default value of the Combo Box to be blank at start (or null or whatever), this way forcing the user to choose for a valid option. I have "selectedIndex" set to -1 but still the default value is my first enumeration value. So how can I have my Combo Box load with no value selected?

Thank you very much for your help.

Cheers.

Answer 1

您需要按照此问题的答案中的建议删除并重新添加ItemListener。