Java Swing: GUI is not updating some properties

Question

EDIT: A EASIEST, SIMPLE AND CHECKABLE PROBLEM BELOW

RESUME

I\'m doing a Latin Square application, which, sets a square of size

Answer 1

Need another Thread for fix it.

Changing the listener class, works fine:

 class ResolveListener implements ActionListener
    {
        @Override
        public void actionPerformed(ActionEvent e)
        {
            new Thread(new Runnable()
            {
                @Override
                public void run()
                {
                    try {
                        TestContainerButtonJPanel.this.testJPanel.colourCells();
                    } catch (InterruptedException e1) {
                        e1.printStackTrace();
                    }
                }
            }).start();
        }


    }
}