How to bootstrap java application with Jetty java configuration

BootstrapApp.java

public class BootstrapApp {
    public static void main(String[] args) throws Exception {
        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);

        addContextPath(context);
        addServlets(context);
        addFilters(context);

        buildAndStartServer(context);

    }

    private static void buildAndStartServer(ServletContextHandler context) throws Exception {
        Server server = new Server(8080);
        server.setHandler(context0);
        server.start();
        server.join();
    }

    private static void addContextPath(ServletContextHandler context) {
        context0.setContextPath("/ExampleApp");
    }

    private static void addServlets(ServletContextHandler context) {
        context0.addServlet(new ServletHolder(new HelloController()), "/hello.html");
        context0.addServlet(new ServletHolder(new ExampleController()), "/example.html");
    }

    private static void addFilters(ServletContextHandler context) {
        context0.addFilter(FilterExample.class, "/hello.html", EnumSet.of(DispatcherType.REQUEST));
        context0.addFilter(FilterExample.class, "/example.html", EnumSet.of(DispatcherType.REQUEST));
    }
}

FilterExample.java

public class FilterExample implements Filter {
  
  public void destroy() {}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {}

	public void init(FilterConfig config) throws ServletException {}
}

HelloController.java

public class HelloController extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {}
}