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src/java.desktop/share/classes/java/awt/ItemSelectable.java

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  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt;
  27 
  28 import java.awt.event.*;
  29 
  30 /**
  31  * The interface for objects which contain a set of items for
  32  * which zero or more can be selected.
  33  *
  34  * @author Amy Fowler
  35  */
  36 
  37 public interface ItemSelectable {
  38 
  39     /**
  40      * Returns the selected items or <code>null</code> if no
  41      * items are selected.
  42      *
  43      * @return the list of selected objects, or {@code null}
  44      */
  45     public Object[] getSelectedObjects();
  46 
  47     /**
  48      * Adds a listener to receive item events when the state of an item is
  49      * changed by the user. Item events are not sent when an item's
  50      * state is set programmatically.  If <code>l</code> is
  51      * <code>null</code>, no exception is thrown and no action is performed.
  52      *
  53      * @param    l the listener to receive events
  54      * @see ItemEvent
  55      */
  56     public void addItemListener(ItemListener l);
  57 
  58     /**
  59      * Removes an item listener.
  60      * If <code>l</code> is <code>null</code>,
  61      * no exception is thrown and no action is performed.
  62      *
  63      * @param   l the listener being removed
  64      * @see ItemEvent
  65      */
  66     public void removeItemListener(ItemListener l);
  67 }


  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt;
  27 
  28 import java.awt.event.*;
  29 
  30 /**
  31  * The interface for objects which contain a set of items for
  32  * which zero or more can be selected.
  33  *
  34  * @author Amy Fowler
  35  */
  36 
  37 public interface ItemSelectable {
  38 
  39     /**
  40      * Returns the selected items or {@code null} if no
  41      * items are selected.
  42      *
  43      * @return the list of selected objects, or {@code null}
  44      */
  45     public Object[] getSelectedObjects();
  46 
  47     /**
  48      * Adds a listener to receive item events when the state of an item is
  49      * changed by the user. Item events are not sent when an item's
  50      * state is set programmatically.  If {@code l} is
  51      * {@code null}, no exception is thrown and no action is performed.
  52      *
  53      * @param    l the listener to receive events
  54      * @see ItemEvent
  55      */
  56     public void addItemListener(ItemListener l);
  57 
  58     /**
  59      * Removes an item listener.
  60      * If {@code l} is {@code null},
  61      * no exception is thrown and no action is performed.
  62      *
  63      * @param   l the listener being removed
  64      * @see ItemEvent
  65      */
  66     public void removeItemListener(ItemListener l);
  67 }
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