E- the type of the elements of this model
public interface ComboBoxModel<E> extends ListModel<E>
ListDataModeland adds the concept of a selected item. The selected item is generally the item which is visible in the combo box display area.
The selected item may not necessarily be managed by the underlying
ListModel. This disjoint behavior allows for the temporary
storage and retrieval of a selected item in the model.
void setSelectedItem(Object anItem)
ListDataListeners that the contents have changed.
anItem- the list object to select or
nullto clear the selection
nullif there is no selection
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