public static boolean connect = false;
public static boolean click = false;
public static boolean serverisworking = false;

            if(connect) {
                ip = ((TextField) scene.lookup("#iptextfield")).getText();
                System.out.println("Server connected to this"+ip+"IP");
                connect = false;
            }
            if(click) {
                client client = new client();
                try {
                    client.run(((TextArea) scene.lookup("#messagetextarea")).getText());
                    ((TextArea) scene.lookup("#outputtextarea")).setText("#messagetextarea");
                } catch(IOException ex) {
                    Logger.getLogger(Lighproject.class.getName()).log(Level.SEVERE, null, ex);
                }
                click = false;
            }
            if (serverisworking && !Constants.text.equals("")){
                System.out.println("server is working");
                System.out.println(server.txt+"Catch error here ");
                ((TextArea) scene.lookup("#outputtextarea")).appendText(Constants.text);
                serverisworking = false;
            }
        }
    }, 0, 3000);
}

public void click() {
    click = true;
}

public void connect() {
    connect = true;
    serverisworking = true;
}

public static String txt="";

public static void main(String[] args) throws IOException {
    ServerSocket ss = new ServerSocket(8000);
    while(true){
        Socket s =ss.accept();
        System.out.println("Client is connected");
        Lighproject.serverisworking=true;

        InputStreamReader in = new InputStreamReader (s.getInputStream());
        BufferedReader bf = new BufferedReader(in);
        String str = bf.readLine();
        System.out.println("Client"+str);
        Constants.text = str;

        PrintWriter pr = new PrintWriter(s.getOutputStream());
        pr.println("Hey there");
        pr.flush();
    }
}

public static String updateAndReturn(){
    return txt;
}

public static void run(String txt) throws IOException {
    Socket s = new Socket(Lighproject.ip,8000);
    PrintWriter pr = new PrintWriter (s.getOutputStream());
    pr.println(txt);
    pr.flush();
    InputStreamReader in = new InputStreamReader (s.getInputStream());
    BufferedReader bf = new BufferedReader (in);

    String str = bf.readLine();
    System.out.println("Server"+str);
}