public static Connection con;

    public static void connect() {
        if (!isConnected()) {
            try {
                con = DriverManager.getConnection("jdbc:mysql://localhost/mixedup?autoReconnect=true&useSSL=false", "root",
                        "159753");
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    public static void disconnect() {
        if (isConnected()) {
            try {
                con.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    public static boolean isConnected() {
        return (con != null);
    }