Its maybe a pretty simple question but i stuck there anyway.
You can set an JComboBox to Editable to insert Values. Normaly theire used for filtering the list.
What i want is that wenn the User enter a Value an exit the field, the programm should check wether the Value is already in the List and if not. It should add it to the list.
I would add a Code Snipped. But at the moment i only got the declaration for the ComboBox.