如何在启动RCP应用程序后设置窗口标题

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.application.ActionBarAdvisor;
import org.eclipse.ui.application.IActionBarConfigurer;
import org.eclipse.ui.application.IWorkbenchConfigurer;
import org.eclipse.ui.application.WorkbenchAdvisor;
import org.eclipse.ui.application.WorkbenchWindowAdvisor;
import org.eclipse.ui.application.WorkbenchWindowAdvisor;

public class ApplicationWorkbenchAdvisor extends WorkbenchAdvisor {

    private static final String WINDOW_TITLE = "My RCP Application";

    @Override
    public WorkbenchWindowAdvisor createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer configurer) {
        return new ApplicationWorkbenchWindowAdvisor(configurer);
    }

    @Override
    public String getInitialWindowPerspectiveId() {
        return null;
    }

    @Override
    public void initialize(IWorkbenchConfigurer configurer) {
        super.initialize(configurer);
        configurer.setSaveAndRestore(true);
    }

    @Override
    public ActionBarAdvisor createActionBarAdvisor(IActionBarConfigurer configurer) {
        return null;
    }

    @Override
    public void preStartup() {
        super.preStartup();
        Display.getDefault().asyncExec(new Runnable() {
            public void run() {
                Shell shell = Display.getDefault().getActiveShell();
                shell.setText(WINDOW_TITLE);
            }
        });
    }
}