I have this error when i try to add items in the JComboBox
incompatible types: ComboBox cannot be converted to String
This is my met
It is hard to be certain without knowing how combobox is declared and at which line the Exception is being thrown...
My guess: combobox is declared as a JComboBox that takes a String and you the Exception is being thrown since a ComboBox is being added instead of a String.
Possible correction: declare the JComboBox to hold instances of ComboBox:
private JComboBox combobox;