//********* Blocking client ***************************************
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import java.net.InetSocketAddress;

public class BC { // BlockingClient
    public static void main(String[ ] args) throws Exception {
        if (args.length < 1) {
          System.err.println("Usage: BC <server's IP addr>");
          return;
        }
        // Create a ByteBuffer to receive data.
        ByteBuffer buff = ByteBuffer.allocate(buff_size);

        // Open a socket channel and configure it as blocking.
        SocketChannel sc = SocketChannel.open();
        sc.configureBlocking(true);

        // Attempt to connect: as blocking is on, the call
        // blocks until successful or an exception is thrown.
        sc.connect(new InetSocketAddress(args[0], port));
        sc.read(buff); // also blocks until data are available
        sc.close();
        System.out.println(new String(buff.array()));
    }
    private static final int port = 2233;
    private static final int buff_size = 512; // in bytes
}