Networking

I wrote the framework to handle the networking action here. (SAVE IT TO YOUR FOLDER THAT YOU ARE WORKING WITH). In BLUEJ - click open project.

This is not a JApplet but a similar class to JFrame called WatcherFrame so extend that (ie)):

public class NetworkApp extends WatcherFrame 
                

You need to have 2 methods, init which you always have and

public void receiveUpdate(Object b) {
                

Receive update will get called when you have received an update [note it receives an object, even if it might be a Dog, or whatever-> so you will need to cast it; ie (Dog d = (Dog)b;]

To send updates, anywhere in your code, you will say

connection.sendObject(whatever); //where whatever is the object you want to send
                

It should be noted, whatever the object is the you send, it must implement Serializable, ie:

public class Dog implements Serializable

Lastly, you will need to start a server and client version of the code which you will do with threads, see below:

public static void main(String[] args) 
{
        //for standalone app keep the code below and comment the 2 threads
//      NetworkApp n= new NetworkApp();
//      n.init();
//      n.setSize(500,500);
//      n.setVisible(true);

        ServerBlueJ s=new ServerBlueJ(3);     //3 is the number of connections you would like to allow
        new ClientBlueJ(new NetworkApp(),500,500,false);
        new ClientBlueJ(new NetworkApp(),500,500,false);
        new ClientBlueJ(new NetworkApp(),500,500,false);
    }