/*
Error:

LansinTVserver.MainFrame is not abstract and does not override abstract method sayHello(int,int) in LansinTVserver.RMI
public class MainFrame  extends javax.swing.JFrame implements RMI {

*/



// Class MainFrame
public class MainFrame  extends javax.swing.JFrame implements RMI {...}


//Class RMI
abstract interface RMI extends Remote  {
    int sayHello(int a, int b) throws RemoteException;
}