/* * @(#)MetalCheckBoxUI.java	1.18 03/12/19 * * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package javax.swing.plaf.metal;import javax.swing.*;import javax.swing.plaf.basic.BasicCheckBoxUI;import java.awt.*;import java.awt.event.*;import javax.swing.plaf.*;import java.io.Serializable;/** * CheckboxUI implementation for MetalCheckboxUI * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing.  As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @version 1.18 12/19/03 * @author Michael C. Albers * */public class MetalCheckBoxUI extends MetalRadioButtonUI {        // NOTE: MetalCheckBoxUI inherts from MetalRadioButtonUI instead    // of BasicCheckBoxUI because we want to pick up all the    // painting changes made in MetalRadioButtonUI.    private final static MetalCheckBoxUI checkboxUI = new MetalCheckBoxUI();    private final static String propertyPrefix = "CheckBox" + ".";    private boolean defaults_initialized = false;    // ********************************    //         Create PlAF    // ********************************    public static ComponentUI createUI(JComponent b) {        return checkboxUI;    }    public String getPropertyPrefix() {	return propertyPrefix;    }    // ********************************    //          Defaults    // ********************************    public void installDefaults(AbstractButton b) {	super.installDefaults(b);	if(!defaults_initialized) {	    icon = UIManager.getIcon(getPropertyPrefix() + "icon");	    defaults_initialized = true;	}    }        protected void uninstallDefaults(AbstractButton b) {	super.uninstallDefaults(b);	defaults_initialized = false;    }}