import java.rmi.*;
import java.rmi.server.*;

// Hello  Server.
public class HelloServer extends UnicastRemoteObject 
  implements IHello {
  
  private String name;
                             
  public HelloServer(String name) throws RemoteException {
    super();
    this.name = name;
  }
  
  public String sayHello() {return "Hello, World!";}

  public static void main(String[] args) {  
    // Install a security manager!
    System.setSecurityManager(new RMISecurityManager());

    try {
      // Create the remote object.
      HelloServer obj = new HelloServer("HelloServer");
    
      // Register the remote object as "HelloServer".
      Naming.rebind("rmi://serverhost/HelloServer", obj);
      System.out.println("HelloServer bound in registry!");
    } 
    catch(Exception e) {
      System.out.println("HelloServer error: " + e.getMessage());
      e.printStackTrace();
    }
  }
}