너는 누구냐.

    public static void main(String[] args) {
        Socket server;
        try{
            server = new Socket("www.apple.com",80);
        }catch(Exception e){
            System.out.println(e);
            return;
        }
        try{
            //request
            BufferedWriter request;
            request = new BufferedWriter(
		new OutputStreamWriter(server.getOutputStream()));
            request.write("GET / HTTP/1.0\n\n");
            request.flush();

            //recieve
            BufferedReader webPage = null;
            webPage = new BufferedReader(
		new InputStreamReader(server.getInputStream()));
            String line;
            while((line=webPage.readLine())!=null)
                System.out.println(line);

        }catch(Exception e){
            System.out.println(e);
            return;

        }
    }

    public static void main(String[] args) {
        // TODO code application logic here
        ServerSocket serverSocket;
        try{
            serverSocket = new ServerSocket(5000);
        }catch(IOException e){
            System.out.println(e);
            return;
        }
        while(true){
            try{
                Socket client = serverSocket.accept();
                System.out.println("Client connects from port"+
                        client.getPort()+"on Machine"+
                        client.getInetAddress());

                //Reads
                BufferedReader clientRequest=null;
                clientRequest = new BufferedReader(
                        new InputStreamReader(client.getInputStream()));
                String request=null;
                String line=null;
                while((line=clientRequest.readLine())!=null)
                    request+=line;
                System.out.println("Client requests "+request);

                //Writes
                BufferedWriter serverResponse=null;
                serverResponse = new BufferedWriter(
                        new OutputStreamWriter(client.getOutputStream()));
                serverResponse.write("Server Responds");
                serverResponse.flush();

                client.close();
            }catch(Exception e){
                System.out.println(e);
                return;
            }
        }
    }