ex3

src/Ex3/App.java

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+package Ex3;
+
+import java.net.InetSocketAddress;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        Server server = new Server(6666);
+        Client client = new Client(new InetSocketAddress("localhost", 6666));
+        // Client client2 = new Client(new InetSocketAddress("localhost", 6666));
+    }
+}

src/Ex3/Client.java

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+package Ex3;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+
+public class Client {
+
+	private final Socket socket;
+
+	/**
+	 * Create a new client
+	 * 
+	 * @param address server adress (needed
+	 * @throws IOException
+	 */
+	public Client(InetSocketAddress address) throws IOException {
+		this.socket = new Socket(address.getAddress(), address.getPort());
+		readMessage();
+		this.socket.close();
+	}
+
+	private void readMessage() {
+		try {
+			BufferedReader reader = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
+			System.out.println("Heure du serveur : " + reader.readLine());
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

src/Ex3/Server.java

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+package Ex3;
+
+import java.io.BufferedOutputStream;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketException;
+import java.time.Instant;
+
+public class Server {
+
+	private final ServerSocket serverSocket;
+
+	public Server(int port) throws IOException {
+		this.serverSocket = new ServerSocket(port);
+		new Thread(this::listen).start();
+	}
+
+	public int getPort() {
+		return this.serverSocket.getLocalPort();
+	}
+
+	private void processConnexion(Socket socket) throws IOException {
+		PrintWriter writer = new PrintWriter(socket.getOutputStream(), true);
+		writer.println(Instant.now().toString());
+		socket.close();
+	}
+
+	private void listen() {
+		while (true) {
+			try {
+				Socket connexion = this.serverSocket.accept();
+				processConnexion(connexion);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
+}