java socket demo

//TCPServer.java

package msb.demo.socket;



import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.Date;



public class TCPServer {



	/**

	 * @param args

	 * @throws IOException

	 * @throws InterruptedException 

	 */

	public static void main(String[] args) throws IOException, InterruptedException {



		ServerSocket serverSocket = new ServerSocket(3333);

		while (true) {

			Socket socket = serverSocket.accept();

			Thread.sleep(2000);

			//read from client

			DataInputStream dis = new DataInputStream(socket.getInputStream());

			String data = dis.readUTF();

			String msg =(new Date() + " accept:" + data);

			System.out.println("Server received:"+msg);

			

			//write to client

			DataOutputStream dos = new DataOutputStream(socket.getOutputStream());

			dos.writeUTF(msg);

			

			dis.close();

			dos.close();

			socket.close();

		}

	}



}





//TCPClient.java

package msb.demo.socket;



import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.Socket;

import java.net.UnknownHostException;



public class TCPClient {



	static int cnt = 0;

	/**

	 * @param args

	 * @throws IOException 

	 * @throws UnknownHostException 

	 */

	public static void main(String[] args) throws Exception {

		

		for(int i=0;i<5;i++)

			connectServer();



	}



	

	static void connectServer() throws Exception{

		Socket socket = new Socket("127.0.0.1",3333);

		DataOutputStream dos = new DataOutputStream(socket.getOutputStream());

		//write to server

		dos.writeUTF("p"+ (++cnt));

		dos.flush();

		

		

		//read from server

		DataInputStream dis = new DataInputStream(socket.getInputStream());

		String msg = dis.readUTF();

		System.out.println("Client received:"+msg);

		

		dos.close();

		dis.close();

		socket.close();



	}

}