My Interface

public interface Myinterface
{
    static final String MyifName="我的接口";
    static final String MyifPrice="价格";
    public double getprice();
}

public class UseMyinterface
{
    public static void main(String[] args)
    {
        MyServer s = new MyServer();
        System.out.println(s.MyifName+s.MyifPrice);
        System.out.println(s.getprice());
    }
}
class MyServer implements Myinterface
{
    public double getprice()
    {
         return 666.66;
    }
}