Question

I am new to socket programming and trying to write a simple cmd line chat application.
Now i use the code below to accept a connection and then create a new thread for the same,but no new thread is created ,and no more then one clients are supported(which is usual when threads are not used),

public class chatserver extends Thread{
    public static Socket client;
    public static void main(String a[]) throws Exception{
        ServerSocket srv = new ServerSocket(4444);
        if((client = srv.accept())!=null){
            new newthread(client);
        }
    }
}
class newthread extends Thread{
    private Socket client;
    public newthread(Socket client){
        super("chatchild");
        this.client = client;
        start();
}

why the threads are not created?I reffered examples at “oracle.com” one of which contains the code for the same but I am not able to figure out the exact sequence what will happen and when???The snippet from exaple code that accepts a connection and creates the thread::

while (listening)
        new KKMultiServerThread(serverSocket.accept()).start();

now here listening is bool var sat to true but it is never set to false anywhere in the code.???How does this work?

Answer 1

You have to continually call accept() to create the other threads:

public static void main(String a[]) throws Exception{
    ServerSocket srv = new ServerSocket(4444);

    while (listening) {
        new newthread(srv.accept());
    }
}

The listening variable should be set to false if and when you want to stop the server.