分析一段worldwind SDK里ApplicationTemplate的Java类代码~~

Question

刚接触worldwind，下了SDK，也在eclipse里面写了个helloworld跑起来了，
是继承ApplicationTemplate类的，可是看不太懂，谁能说明下里面的方法都有什么功能吗？

Answer 1

http://http://hi.baidu.com/willis1313/album/item/9d1b09cba2241b3bbf09e63d.html
初次发帖，不清楚怎么把图片上传上去

Answer 2

public class ApplicationTemplate{
    public static class AppPanel extends JPanel{
        protected WorldWindowGLCanvas wwd;
        protected StatusBar statusBar;
        public AppPanel(Dimension canvasSize, boolean includeStatusBar){
            super(new BorderLayout());
            this.wwd = this.createWorldWindow();
            this.wwd.setPreferredSize(canvasSize);
            Model m = (Model) WorldWind.createConfigurationComponent(AVKey.MODEL_CLASS_NAME);
            this.wwd.setModel(m);
            this.wwd.addSelectListener(new ClickAndGoSelectListener(this.getWwd(), WorldMapLayer.class));
            this.add(this.wwd, BorderLayout.CENTER);
            if (includeStatusBar){
                this.statusBar = new StatusBar();
                this.add(statusBar, BorderLayout.PAGE_END);
                this.statusBar.setEventSource(wwd);}}
        protected WorldWindowGLCanvas createWorldWindow(){
            return new WorldWindowGLCanvas()；}
        public WorldWindowGLCanvas getWwd(){
            return wwd;}
        public StatusBar getStatusBar(){
            return statusBar;}}
    protected static class AppFrame extends JFrame{
        private Dimension canvasSize = new Dimension(800, 600);
        protected AppPanel wwjPanel;
        protected LayerPanel layerPanel;
        protected StatisticsPanel statsPanel;
        public AppFrame(){
            this.initialize(true, true, false);}
        public AppFrame(boolean includeStatusBar, boolean includeLayerPanel, boolean includeStatsPanel){
            this.initialize(includeStatusBar, includeLayerPanel, includeStatsPanel);}
        protected void initialize(boolean includeStatusBar, boolean includeLayerPanel, boolean includeStatsPanel){
            this.wwjPanel = this.createAppPanel(this.canvasSize, includeStatusBar);
            this.wwjPanel.setPreferredSize(canvasSize
            this.getContentPane().add(wwjPanel, BorderLayout.CENTER);
            if (includeLayerPanel){
                this.layerPanel = new LayerPanel(this.wwjPanel.getWwd(), null);
                this.getContentPane().add(this.layerPanel, BorderLayout.WEST);}
            if (includeStatsPanel){
                this.statsPanel = new StatisticsPanel(this.wwjPanel.getWwd(), new Dimension(250, canvasSize.height));
                this.getContentPane().add(this.statsPanel, BorderLayout.EAST);
                this.wwjPanel.getWwd().addRenderingListener(new RenderingListener(){
                    public void stageChanged(RenderingEvent event){
                        if (event.getSource() instanceof WorldWindow){
                            EventQueue.invokeLater(new Runnable(){
                                public void run({
                                    statsPanel.update(wwjPanel.getWwd());}});}}});}
            this.wwjPanel.getWwd().addRenderingExceptionListener(new RenderingExceptionListener(){
                public void exceptionThrown(Throwable t){
                    if (t instanceof WWAbsentRequirementException){
                        String message = "Computer does not meet minimum graphics requirements.\n";
                        message += "Please install up-to-date graphics driver and try again.\n";
                        message += "Reason: " + t.getMessage() + "\n";
                        message += "This program will end when you press OK.";
                        JOptionPane.showMessageDialog(AppFrame.this, message, "Unable to Start Program",
                            JOptionPane.ERROR_MESSAGE);
                        System.exit(-1);}}});
            this.pack();
            Dimension prefSize = this.getPreferredSize();
            Dimension parentSize;
            java.awt.Point parentLocation = new java.awt.Point(0, 0);
            parentSize = Toolkit.getDefaultToolkit().getScreenSize();
            int x = parentLocation.x + (parentSize.width - prefSize.width) / 2;
            int y = parentLocation.y + (parentSize.height - prefSize.height) / 2;
            this.setLocation(x, y);
            this.setResizable(true}
        protected AppPanel createAppPanel(Dimension canvasSize, boolean includeStatusBar){
            return new AppPanel(canvasSize, includeStatusBar);}
        public Dimension getCanvasSize(){
            return canvasSize;}
        public AppPanel getWwjPanel(){
            return wwjPanel;}
        public WorldWindowGLCanvas getWwd(){
            return this.wwjPanel.getWwd();}
        public StatusBar getStatusBar(){
            return this.wwjPanel.getStatusBar();}
        public LayerPanel getLayerPanel(){
            return layerPanel;}
        public StatisticsPanel getStatsPanel(){
            return statsPanel;}}
    public static void insertBeforeCompass(WorldWindow wwd, Layer layer){
        int compassPosition = 0;
        LayerList layers = wwd.getModel().getLayers();
        for (Layer l : layers){
            if (l instanceof CompassLayer)
                compassPosition = layers.indexOf(l);}
        layers.add(compassPosition, layer);}
    public static void insertBeforePlacenames(WorldWindow wwd, Layer layer){
        int compassPosition = 0;
        LayerList layers = wwd.getModel().getLayers();
        for (Layer l : layers){
            if (l instanceof PlaceNameLayer)
                compassPosition = layers.indexOf(l);}
        layers.add(compassPosition, layer)}
    public static void insertAfterPlacenames(WorldWindow wwd, Layer layer){
       int compassPosition = 0;
        LayerList layers = wwd.getModel().getLayers();
        for (Layer l : layers){
            if (l instanceof PlaceNameLayer)
                compassPosition = layers.indexOf(l);}
        layers.add(compassPosition + 1, layer);}
    public static void insertBeforeLayerName(WorldWindow wwd, Layer layer, String targetName){
        int targetPosition = 0;
        LayerList layers = wwd.getModel().getLayers();
        for (Layer l : layers){
            if (l.getName().indexOf(targetName) != -1){
                targetPosition = layers.indexOf(l);
                break;}}
        layers.add(targetPosition, layer);  }
    static{
        if (Configuration.isMacOS()){
            System.setProperty("apple.laf.useScreenMenuBar", "true");
            System.setProperty("com.apple.mrj.application.apple.menu.about.name", "World Wind Application");
            System.setProperty("com.apple.mrj.application.growbox.intrudes", "false");
            System.setProperty("apple.awt.brushMetalLook", "true");}}
    public static AppFrame start(String appName, Class appFrameClass){
        if (Configuration.isMacOS() && appName != null){
            System.setProperty("com.apple.mrj.application.apple.menu.about.name", appName);}
        try{
            final AppFrame frame = (AppFrame) appFrameClass.newInstance();
            frame.setTitle(appName);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            java.awt.EventQueue.invokeLater(new Runnable(){
                public void run(){
                    frame.setVisible(true);}});
           return frame;}
        catch (Exception e){
            e.printStackTrace();
            return null;}}
    public static void main(String[] args){
       ApplicationTemplate.start("World Wind Application", AppFrame.class);}}
里面的方法都是什么作用的？