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    1   /*
    2    * Copyright (c) 1997, 2001, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   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 javax.swing.plaf.basic;
   27   
   28   import sun.awt.AppContext;
   29   
   30   import javax.swing;
   31   
   32   import java.awt;
   33   import java.awt.event;
   34   import javax.swing.plaf;
   35   import java.io.Serializable;
   36   
   37   
   38   /**
   39    * CheckboxUI implementation for BasicCheckboxUI
   40    * <p>
   41    * <strong>Warning:</strong>
   42    * Serialized objects of this class will not be compatible with
   43    * future Swing releases. The current serialization support is
   44    * appropriate for short term storage or RMI between applications running
   45    * the same version of Swing.  As of 1.4, support for long term storage
   46    * of all JavaBeans<sup><font size="-2">TM</font></sup>
   47    * has been added to the <code>java.beans</code> package.
   48    * Please see {@link java.beans.XMLEncoder}.
   49    *
   50    * @author Jeff Dinkins
   51    */
   52   public class BasicCheckBoxUI extends BasicRadioButtonUI {
   53   
   54       private static final Object BASIC_CHECK_BOX_UI_KEY = new Object();
   55   
   56       private final static String propertyPrefix = "CheckBox" + ".";
   57   
   58       // ********************************
   59       //            Create PLAF
   60       // ********************************
   61       public static ComponentUI createUI(JComponent b) {
   62           AppContext appContext = AppContext.getAppContext();
   63           BasicCheckBoxUI checkboxUI =
   64                   (BasicCheckBoxUI) appContext.get(BASIC_CHECK_BOX_UI_KEY);
   65           if (checkboxUI == null) {
   66               checkboxUI = new BasicCheckBoxUI();
   67               appContext.put(BASIC_CHECK_BOX_UI_KEY, checkboxUI);
   68           }
   69           return checkboxUI;
   70       }
   71   
   72       public String getPropertyPrefix() {
   73           return propertyPrefix;
   74       }
   75   
   76   }

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