<extension point="org.eclipse.ui.commands">  
  <category description="Foreworld" id="net.foreworld.rss2.commands" name="Foreworld" />  
  <command categoryId="net.foreworld.rss2.commands" description="打开新窗口" id="net.foreworld.rss2.bindings.command.open_new_window" name="打开新窗口" />
</extension>

    <extension point="org.eclipse.ui.bindings">  
  <scheme id="net.foreworld.rss2.bindings" name="Foreworld" />
  <key commandId="net.foreworld.rss2.bindings.command.open_new_window" schemeId="net.foreworld.rss2.bindings" sequence="Ctrl+N" />
</extension>

public static final ActionFactory OPEN_NEW_WINDOW = new ActionFactory(ActionFactory.OPEN_NEW_WINDOW.getId()){
  public IWorkbenchAction create(IWorkbenchWindow window) {
    IWorkbenchAction action = ActionFactory.OPEN_NEW_WINDOW.create(window);
    String id = "net.foreworld.rss2.bindings.command.open_new_window";
    if(action != null){
      action.setText("打开新窗口(&N)");
      action.setActionDefinitionId(id);
    }
    return action;
  }
};

this.register(RSS2ActionFactory.OPEN_NEW_WINDOW.create(this.window));