Non-blocking connection on a SocketChannel?

Question

I'm trying out the non-blocking connection of a SocketChannel. So I wrote the following test code and supply a list of IPs (both good and bad IPs). But disregard the IPs I always get the result of a channel being in connection pending state (even for some bogus IPs). Any help will be great.
public class ConnectTest
    public static void main(String[] args) throws
Exception
        List<SocketChannel> channels = new ArrayList<SocketChannel>();
        for ( String s: args )
            SocketChannel channel = SocketChannel.open();
            channel.configureBlocking(false);
            channels.add(channel);        
            InetSocketAddress remote = new InetSocketAddress(s, 80);
            channel.connect(remote);
        System.out.println("wait for timeout...");
        Thread.sleep(10000);
        for ( SocketChannel c : channels )
            if ( c.isConnected() )
                System.out.println(c.socket().getInetAddress() + " connected ");
            else if ( c.isConnectionPending() )
                System.out.println(c.socket().getInetAddress() + " connection pending ");               
            else
                System.out.println(c.socket().getInetAddress() + " timeout ");
            c.close();
}

Answer 1

Forget the sleep: use a Selector, selecting on OP_CONNECT. When you get it, call SocketChannel.finishConnect() for the channel(s) selected. If that method returns 'true', the connection is complete. If it returns 'false', the connection is still pending (and in fact OP_CONNECT should not have fired); if it throws an exception, the connection attempt has failed.
If the connection is complete you must also deregister it for OP_CONNECT before registering it for OP_READ or OP_WRITE.