public class Initial { public static void main(String[] args) {  // TODO Auto-generated method stub    Telphone tel1 =new Cellphone();     tel1.call();    tel1.message();    Telphone tel2 =new Smartphone();    tel2.call();    tel2.message();        IPlayGame ip1 = new Smartphone();//这句总是报错    IPlayGame ip2 =new Psp();      }}