hg/apidesign: samples/friendpackage/src/apipkg/Item.java@8b87a7d88b31

     1 package apipkg;

     3 import implpkg.Accessor;

     4 import javax.swing.event.ChangeEvent;

     5 import javax.swing.event.ChangeListener;

     7 /** Class in API that everyone can use.

     8  *

     9  * @author Jaroslav Tulach

    10  */

    11 // BEGIN: design.less.friend.Item

    12 public final class Item {

    13     private int value;

    14     private ChangeListener listener;

    16     // BEGIN: design.less.friend.Item.static

    17     static {

    18         Accessor.setDefault(new AccessorImpl());

    19     }

    20     // END: design.less.friend.Item.static

    22     /** Only friends can create instances. */

    23     Item() {

    24     }

    26     /** Anyone can change value of the item.

    27      */

    28     public void setValue(int newValue) {

    29         value = newValue;

    30         ChangeListener l = listener;

    31         if (l != null) {

    32             l.stateChanged(new ChangeEvent(this));

    33         }

    34     }

    36     /** Anyone can get the value of the item.

    37      */

    38     public int getValue() {

    39         return value;

    40     }

    42     /** Only friends can listen to changes.

    43      */

    44     void addChangeListener(ChangeListener l) {

    45         assert listener == null;

    46         listener = l;

    47     }

    49 }

    50 // END: design.less.friend.Item

author	Jaroslav Tulach <jtulach@netbeans.org>
	Sat, 14 Jun 2008 10:03:27 +0200
changeset 190	8b87a7d88b31
parent 154	0fd5e9c500b9
child 285	321b25b8f6f8
permissions	-rw-r--r--