MulticastSocket class and UDP

I m working with MulticastSocket, sending a single packet over a group of computers or networks (each client)using Multicast IP-Address.
i am stuck over a point where let suppose a network comprises of 4 clients of same Multicast IP group. any computer joins network, server stores the hostname of the computer in a vector table, and sends that host name and all other hostnames in the vector table "to all other computers already in vector table.."
moreover if any computer leaves the network,
it removes the name from the vector table and again sends the remaining hostnames in vectortable to the remaining computers...

Well nobody else knows about the join/leave except the client who is joining or leaving, so the client is going to have to send a join/leave notification multicast after it joins and before it leaves. If the other computers care who else is receiving multicasts. But why should they?

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    Thanks,
    Samantak.
    Rewards points for useful answers.

  • Document Classes and other Questions

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                                  now = new Date();
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                        public var minuteHand_mc:time1;
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  • I have been getting java.lang.ClassNotFoundException: ZeroApplet.class and java.lang.ClassNotFoundException: JavaToJS.class crashes with JRE version 1.6.0_26-b03-384-10M3425 VM executing a Java Applet. Is Apple aware of this problem? No longer supported?

    My web page uses a Java Applet to allow my visitors to replay chess games; the Chess Viewer Deluxe applet was written by Nikolai Pilafov some time ago and has been working properly for some time (until recently). I don't monitor this part of my site regularly so I am not sure when it began to fail. On his web site [http://chesstuff.blogspot.com/2008/11/chess-viewer-deluxe.html] he has a link to check LiveConnect object functionality (which fails for OBJECT tags). His recommendation is to "seek platform specific support which might be available from the JRE developers for your platform".
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        at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:662)
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        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
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    private String lastName;
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    private String phoneNumber;
    private String address;
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    public String getSS() {
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    this.middleName = middleName;
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