Asynchronous & multithreaded TCP server/client example in Java

Example.java

public static class Example {
  public static void main(String[] argss) throws Exception {
        int intStart = 6;

        try (ServerSocket serverSocket = new ServerSocket()) {
            serverSocket.bind(new InetSocketAddress(0));

            Thread serverThread = new Thread(() -> {
                try {
                    while (serverSocket.isBound()) {
                        Socket clientSocket = serverSocket.accept();

                        DataInputStream inputStream = new DataInputStream(clientSocket.getInputStream());
                        DataOutputStream outputStream = new DataOutputStream(clientSocket.getOutputStream());

                        Thread serverWriter = new Thread(() -> {
                            try {
                                for (int i = 0; i < intStart; i++) {
                                    Thread.sleep(1000);
                                    outputStream.writeInt(i);
                                }
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        });

                        serverWriter.start();
                        for (int i = 0; i < intStart; i++) {
                            Thread.sleep(300);
                            inputStream.readInt();
                        }
                        serverWriter.join();
                    }
                } catch (Exception ignored) {
                }
            });

            serverThread.start();

            try (Socket clientSocket = new Socket()) {
                clientSocket.connect(new InetSocketAddress(serverSocket.getLocalPort()));

                DataInputStream inputStream = new DataInputStream(clientSocket.getInputStream());
                DataOutputStream outputStream = new DataOutputStream(clientSocket.getOutputStream());

                Thread clientWriter = new Thread(() -> {
                    try {
                        for (int i = 0; i < intStart; i++) {
                            Thread.sleep(200);
                            outputStream.writeInt(i);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                });

                clientWriter.start();
                for (int i = 0; i < intStart; i++) {
                    Thread.sleep(300);
                    System.out.println("client read: " + inputStream.readInt());
                }
                clientWriter.join();
            } finally {
                serverSocket.close();
                serverThread.join();
            }
        }
    }
}