applet如何打开新的网页，如何和所在网页通讯

Question

通过AppletContext通讯getAppletContext()

Answer 1

AppletContext aplctx=this.getAppletContext();
  try{
      String prefix=url.getProtocol()+"://";
      String newUrl=prefix+url.getHost()+url.getFile()+"help.html";
      aplctx.showDocument(new URL(newUrl),"_blank");
      }catch(MalformedURLException ee){System.out.println("Home page error!");}
  }
记得给分啊！