What servlet code corresponds to the various scope

What servlet code corresponds to the various "scope" values for the <jsp:useBean> tag

Scope	JSP	Servlet Code
application	<jsp:useBean class="foo.Counter" scope="application" />	foo.Counter counter = (foo.Counter)getServletContext().getAttribute("counter"); if (counter == null) {  counter = new foo.Counter();  getServletContext().setAttribute("counter", counter);   }
Session	<jsp:useBean id="counter" class="foo.Counter" scope="session" />	HttpSession session = request.getSession(true); foo.Counter counter = (foo.Counter)session.getValue("counter"); if (counter == null) {  counter = new foo.Counter();  session.putValue("counter", counter); }
request	<jsp:useBean id="counter" class="foo.Counter" scope="request" />	foo.Counter counter = (foo.Counter)request.getAttribute("counter"); if (counter == null) {  counter = new foo.Counter();  request.setAttribute("counter", counter); }
page	<jsp:useBean id="counter" class="foo.Counter" scope="page" />	foo.Counter counter = new foo.Counter();