java - Android Webview page load message -

im trying add message on webview if page thats trying load fails. possible? if so, possible message replace default "the webpage failed load" screen?

activity file

public class mainactivity extends activity {      webview web;     progressbar progressbar;     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          web = (webview) findviewbyid(r.id.webview01);         progressbar = (progressbar) findviewbyid(r.id.progressbar);          web.setwebviewclient(new mywebclient());         web.getsettings().setjavascriptenabled(true);         web.loadurl("http://www.technotalkative.com");     }      public class mywebclient extends webviewclient     {         @override         public void onpagestarted(webview view, string url, bitmap favicon) {             // todo auto-generated method stub             super.onpagestarted(view, url, favicon);         }          @override         public boolean shouldoverrideurlloading(webview view, string url) {             // todo auto-generated method stub              view.loadurl(url);             return true;          }          @override         public void onpagefinished(webview view, string url) {             // todo auto-generated method stub             super.onpagefinished(view, url);              progressbar.setvisibility(view.gone);         }     }       @override      public boolean onkeydown(int keycode, keyevent event) {         if ((keycode == keyevent.keycode_back) && web.cangoback()) {             web.goback();             return true;         }         return super.onkeydown(keycode, event);     }  }