nio ServerSocketChannel and SocketChannel

package c.ct.io.nio;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;

public class ServerSocketChannelTest {
    public static void main(String[] args) throws IOException {

        ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
        serverSocketChannel.configureBlocking(false);
        serverSocketChannel.socket().bind(new InetSocketAddress(80));
        System.out.println("server is Listening client");
        while (true) {
            SocketChannel sc = serverSocketChannel.accept();
            if (sc != null) {
                ByteBuffer buffer = ByteBuffer.allocate(1024);
                while (sc.read(buffer) != -1) {
                    buffer.flip();

                    while (buffer.hasRemaining()) {
                        System.out.print((char) buffer.get());
                    }
                    System.out.println();
                    buffer.clear();
                }

            }

        }

        // serverSocketChannel.close();
    }

}


package c.ct.io.nio;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class SocketChannelTest {
    public static void main(String[] args) {

        ExecutorService service = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
        for(int i=0;i<5;i++){
            service.submit(new SocketThread("socketThread"+i));
        }
        service.shutdown();

    }

    private static class SocketThread implements  Runnable{
        private String name;
        public SocketThread(String name) {
            this.name = name;
        }

        @Override
        public void run() {
            SocketChannel socketChannel = null;
            try {
                socketChannel = SocketChannel.open();
                socketChannel.connect(new InetSocketAddress("localhost",80));
            } catch (IOException e) {
                e.printStackTrace();
            }

            String newData = this.name + " New String to write to file..." + System.currentTimeMillis();
            ByteBuffer buffer = ByteBuffer.allocate(newData.length());
            buffer.clear();
            buffer.put(newData.getBytes());
            buffer.flip();
            while(buffer.hasRemaining()) {
                try {
                    socketChannel.write(buffer);
                    socketChannel.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}