import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.awt.*;
import java.awt.event.*;
import java.net.InetAddress;


public class PopupClientImpl extends UnicastRemoteObject implements PopupClientInterface{

 String s;
/**
  * Constructor , just calls the constructor for UnicastRemoteObject
  * Create and export a new UnicastRemoteObject object using an anonymous port 
  */

 PopupClientImpl() throws RemoteException{
 	super();
   }

/**
  *Shows the popup on the client in a new frame.
  *@param String containing the message to be brodcast.
  */ 
  public void showPopup(String s) throws RemoteException{
  	final Frame f= new Frame();  // Create a new frame
  	this.s=s;
  	f.setSize(200,100);
  	f.setTitle(s);
  	f.add( new Label(s));

/* 
  This adds the anonymous inner class to handle the closing of the frame
  by extending the windowAdapter and overriding the windowCloing method
  note the syntax may seem a little cryptic at first 
  it follows the convention
      new Super{
                .....
                 }
              
 where Super is an interface or a superclass.

*/
    	f.addWindowListener(new WindowAdapter(){
  	 public void windowClosing(WindowEvent e){
  	    	f.dispose();
  	    	   }
  	         });

  	         
  	f.setVisible(true);
  }

 /**
   *Returns some information about the individual client.
   *An ip address in our case, could also be a login name etc
   *@return String containing the IP address or login name
   */    
public String getInfo() throws RemoteException{
	try{
		
	return InetAddress.getLocalHost().getHostAddress();
	}
	catch(Exception e){ return e.toString();}
	}
}