import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
public class Main {
public static void main(String[] argv) throws Exception {
SocketChannel sChannel = SocketChannel.open();
sChannel.configureBlocking(false);
sChannel.connect(new InetSocketAddress("hostName", 12345));
ByteBuffer buf = ByteBuffer.allocateDirect(1024);
buf.put((byte) 0xFF);
buf.flip();
int numBytesWritten = sChannel.write(buf);
}
}