Program not responding on ServerSocket.accept server - Java

Question

My program listens for only one connection once ... the program just gets stuck in clientSocket = serverSocket.accept () if the client does not connect. I mean, I can't even interrupt him by closing the window. I cannot click any of my buttons in a frame, etc.

I used this code the same way as in my other programs, but it worked perfectly (I can click on the text fields and buttons and elements and enter values ​​in them, for this it just hangs there until the client connects, maybe 't even go out).

public void runServer() {
    try {
        serverSocket = new ServerSocket(PORT_NUMBER, 20);
        clientSocket = serverSocket.accept();
        taDisplay.append("Client connected!");
        lblPlayingTo.setText("Playing to: " + objective);

        socketIn = new DataInputStream(clientSocket.getInputStream());
        socketOut = new DataOutputStream(clientSocket.getOutputStream());

        socketOut.writeUTF(serverName);
        clientName = socketIn.readUTF();
        lblEastScore.setText(clientName + ": " + eastScore.getScore());  

    } catch (IOException e) {
        System.out.println(e);
        taDisplay.append("Could not listen on port: " + PORT_NUMBER + ".\n");
    }
}

I deleted all my code except this one (below), but I still get the same “freeze” problem

    setTitle(title);
    setSize(sizeW, sizeH);
    setVisible(visibility);
    setResizable(resizability);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    addKeyListener(new MyKeyAdapter());
    addMouseListener(new MyMouseAdapter());

    //Container
    c = getContentPane();
    c.setLayout(new BorderLayout());

Answer 1

, serverSocket.accept() GUI (EDT). Swing EDT - "accept", .

, ( "" , EDT), , . , , , Runnable EDT SwingUtilities.invokeLater.