The repaint () method is not recognized within a [closed] timer

This code works for me in the constructor of my jframe, it prints me an image in a label. Now I have a checkbox and when pressed I want to put the image for a second because of the timer but I mark error the repaint () method asks me the Netbeans create the method within the actionlistener, I do not know how to fix it. here my code in the action performed of the checkbox:

    private void simulacionActionPerformed(java.awt.event.ActionEvent evt) {                                           
        if(simulacion.isSelected()){
            t = new Timer(1000,new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ae) {
            ImageIcon imagen0 = new ImageIcon("src/imagenesmedidor/menora50.jpg");
            Icon icono0 = new ImageIcon(imagen0.getImage().getScaledInstance(medidor.getWidth(),medidor.getHeight(), Image.SCALE_DEFAULT));
            medidor.setIcon(icono0);
            this.repaint();
            }
        });

        }