Java游戏高级编程！！很不错的！！！Java游戏高级编程！！很不错的

				     package com.croftsoft.apps.chat.view;								     import java.awt.*;				     import javax.swing.JComponent;								     import com.croftsoft.core.animation.ComponentAnimator;				     import com.croftsoft.core.animation.ComponentPainter;				     import com.croftsoft.core.animation.painter.ColorPainter;				     import com.croftsoft.core.awt.image.ImageCache;				     import com.croftsoft.core.lang.NullArgumentException;								     import com.croftsoft.apps.chat.model.ChatGameAccessor;								     /*********************************************************************				     * ChatGame ComponentAnimator.				     *				     * @version				     *   2003-06-11				     * @since				     *   2003-06-06				     * @author				     *   David Wallace Croft				     *********************************************************************/								     public final class  ChatGameAnimator				       implements ComponentAnimator				     //////////////////////////////////////////////////////////////////////				     //////////////////////////////////////////////////////////////////////				     {								     private static final Color  BACKGROUND_COLOR = Color.BLACK;								     //								     private final ChatGameAccessor   chatGameAccessor;								     private final ComponentPainter   backgroundColorPainter;								     private final ChatWorldAnimator  chatWorldAnimator;								     //////////////////////////////////////////////////////////////////////				     //////////////////////////////////////////////////////////////////////								     public  ChatGameAnimator (				       ChatGameAccessor  chatGameAccessor,				       JComponent        component,				       ClassLoader       classLoader,				       String            mediaDir )				     //////////////////////////////////////////////////////////////////////				     {				       NullArgumentException.check (				         this.chatGameAccessor = chatGameAccessor );								       backgroundColorPainter = new ColorPainter ( BACKGROUND_COLOR );								       chatWorldAnimator = new ChatWorldAnimator (				         chatGameAccessor.getChatWorldAccessor ( ),				         new ImageCache (				           Transparency.BITMASK,				           component,				           classLoader,				           mediaDir ) );				     }								     //////////////////////////////////////////////////////////////////////				     // interface ComponentAnimator methods				     //////////////////////////////////////////////////////////////////////								     public void  update ( JComponent  component )				     //////////////////////////////////////////////////////////////////////				     {				       chatWorldAnimator.update ( component );				     }								     public void  paint (				       JComponent  component,				       Graphics2D  graphics )				     //////////////////////////////////////////////////////////////////////				     {				       backgroundColorPainter.paint ( component, graphics );								       chatWorldAnimator.paint ( component, graphics );				     }								     //////////////////////////////////////////////////////////////////////				     //////////////////////////////////////////////////////////////////////				     }