solution

pom.xml

@@ -33,5 +33,12 @@
 			<version>5.5.2</version>
 			<scope>test</scope>
 		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
+		<dependency>
+		    <groupId>org.jsoup</groupId>
+		    <artifactId>jsoup</artifactId>
+		    <version>1.17.1</version>
+		</dependency>
+
 	</dependencies>
 </project>

src/main/java/lab12/App.java

+package lab12;
+
+public class App {
+
+	public static void main(String[] args) {
+		while(true) {
+			String val = System.in.toString();
+			System.out.println(val);
+		}
+
+	}
+
+}

src/main/java/lab12/ClientApp.java

+package lab12;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+
+public class ClientApp {
+	public static void main(String[] args) {
+		try (Socket soc = new Socket(args[0],Integer.parseInt(args[1]));
+			PrintWriter pw = new PrintWriter(soc.getOutputStream());
+			BufferedReader br = new BufferedReader(new InputStreamReader(soc.getInputStream()));)
+		{
+			BufferedReader brc = new BufferedReader(new InputStreamReader(System.in));
+			String line;
+			do {
+				line = brc.readLine();
+				pw.println(line);
+				pw.flush();
+				String lineFromServer = br.readLine();
+				System.out.println(lineFromServer);
+
+			} while (!"quit".equals(line));
+			System.out.println(br.readLine());
+			
+		} catch (NumberFormatException | IOException e) {
+			e.printStackTrace();
+		}
+	}
+}

src/main/java/lab12/ImgDownloader.java

+package lab12;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
+
+public class ImgDownloader {
+
+	public static void main(String[] args) throws IOException {
+		Document doc =  Jsoup.connect(args[0]).get(); 
+		Elements elements = doc.select("img[src]");
+		for (Element el: elements) {
+			String imgUrl = el.attr("abs:src");
+			System.out.println(imgUrl);
+			new Thread(() -> downloadImg(imgUrl, args[1]));
+			
+		}
+
+	}
+
+	private static void downloadImg(String imgUrl, String pathDir) {
+		
+		URL url;
+		try {
+			url = new URL(imgUrl);
+			String fileName =url.getPath();
+			fileName = fileName.substring(fileName.lastIndexOf("/") + 1);
+			URLConnection connection = url.openConnection();
+			
+			try (InputStream is = connection.getInputStream() ){
+				Path path = Paths.get(pathDir, fileName);
+				try (OutputStream os = new FileOutputStream(path.toFile())) {
+					byte[] buffer = new byte[2048];
+					int len;
+					while (-1 != (len = is.read(buffer))) {
+						os.write(buffer, 0, len);
+					}
+				}
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		
+	}
+
+}

src/main/java/lab12/ServerApp.java

@@ -24,9 +24,10 @@ public class ServerApp {
 	protected void listen() {
 		System.out.println("Server started and ready to connection");
 		while (true) {
-			try(Socket socketFromClient = server.accept()) {
+			try {
+				Socket socketFromClient = server.accept();
 				System.out.println("Client connected: " + socketFromClient.getInetAddress());
-				new ServerComunicator(socketFromClient).handle();
+				new Thread(() -> new ServerComunicator(socketFromClient).handle()).start();
 			} catch (IOException e) {
 				e.printStackTrace();
 			}

src/main/java/lab12/ServerComunicator.java

@@ -31,6 +31,7 @@ public class ServerComunicator {
 			writerToClentSocket.write("May the Java be with you.");
 			writerToClentSocket.newLine();
 			writerToClentSocket.flush();
+			this.socket.close();
 		} catch (IOException e) {
 			e.printStackTrace();
 		}

src/main/java/module-info.java

 module cz.jezek.lab12 {
     opens lab12 to javafx.fxml;
     exports lab12;
+    requires org.jsoup;
 }
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