htmlunit模拟浏览器访问页面，请问怎么设置页面停留时间

Question

WebClient webClient = new WebClient(BrowserVersion.FIREFOX_38,ip,port);
webClient.getOptions().setJavaScriptEnabled(true);
webClient.getOptions().setCssEnabled(false);
webClient.setAjaxController(new NicelyResynchronizingAjaxController());
webClient.getOptions().setTimeout(15000); 
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
webClient.addRequestHeader("Referer", "http://www.hao123.com");
HtmlPage rootPage= webClient.getPage(url);

Answer 1

Time.out("时间差")

Answer 2

Time.out("时间戳")