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package javax.swing;


A data model for a combo box. This interface extends ListDataModel
and 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.

Author:Arnaud Weber
Type parameters:
  • <E> – the type of the elements of this model
Since:1.2
/**
 * A data model for a combo box. This interface extends <code>ListDataModel</code>
 * and adds the concept of a <i>selected item</i>. The selected item is generally
 * the item which is visible in the combo box display area.
 * <p>
 * The selected item may not necessarily be managed by the underlying
 * <code>ListModel</code>. This disjoint behavior allows for the temporary
 * storage and retrieval of a selected item in the model.
 *
 * @param <E> the type of the elements of this model
 *
 * @author Arnaud Weber
 * @since 1.2
 */
public interface ComboBoxModel<E> extends ListModel<E> {

  
Set the selected item. The implementation of this  method should notify
all registered ListDataListeners that the contents
have changed.

Params:
  • anItem – the list object to select or null
       to clear the selection
/**
   * Set the selected item. The implementation of this  method should notify
   * all registered <code>ListDataListener</code>s that the contents
   * have changed.
   *
   * @param anItem the list object to select or <code>null</code>
   *        to clear the selection
   */
  void setSelectedItem(Object anItem);

  
Returns the selected item

Returns:The selected item or null if there is no selection
/**
   * Returns the selected item
   * @return The selected item or <code>null</code> if there is no selection
   */
  Object getSelectedItem();
}