GWT中如何把用TabPanel实现的部件改成用TabBar和DeckPanel来实现

各位，我刚刚接触GWT不久，如题不知道怎么做了
TabPanel studentTabPanel = new TabPanel();
studentTabPanel.add(new ContentPanel(learning), navigation.navigationOneself());
换成TabBar和DeckPanel来实现，不是太懂了
谁能给个简单的代码例子之类的谢谢了
我就了解一点
TabBar widget = new TabBar();
widget.addTab("First");

DeckPanel panel = new DeckPanel();
label = new Label("Widget 0");
label.addStyleName("demo-label-bigborder");
panel.add(label);
单独的还能看懂点 一合起来都不知道怎么用了
现在用TabPanel的代码是这样的
public class MainTabPanel extends TabPanel{
public MainTabPanel(){
this.clear();
this.setWidth("100%");
this.setHeight("100%");
}
@Override
public void selectTab(final int index) {
GWT.log("select tab: " + index, null);
super.selectTab(index);
DeferredCommand.addCommand(new Command() {
public void execute() {
ContentWidget w = (ContentWidget) getWidget(index);
w.refresh();
}
});
}
}
显示页面是这样的
MainTabPanel studentTabPanel = new MainTabPanel();
studentTabPanel.add(new ContentPanel(learning), navigation.navigationOneself());
setCenter(studentTabPanel);
那位大侠帮我看看怎么解决