Java repaint does not render component correctly

im developing a GUI application using JSWing, load the XML file, then deserialize it, then add the whole created object to the JPanel. However, until I go to the window or click on the panel, it looks like this:

After moving the window, they look correct, so how to fix this problem <

I have looked at this link http://docs.oracle.com/javase/6/docs/api/javax/swing/JComponent.html#paintComponent(java.awt.Graphics) and this might be the answer since in the JComponent constructor I am using

setOpaque(true);

      

        
        
        
      

    

but I'm still not sure how to fix the problem as this part of the documentation is very hard to understand (it somehow just doesn't make any sense to me: -D)

By the way, the picture itself looks something like this:

for (NetObject o : objects) {

                addNewObject(o);
            }

      

        
        
        
      

    

and addNewObject (not all code)

public void addNewObject(NetObject o) {



         DraggableComponent object = new DraggableComponent(o, editorIndex); //Creates a draggableComponent
        this.add(object);//Adds this component to main container

        object.setOverbearing(true); //On click ,this panel gains lowest z-buffer


            object.setSize(48, 48);
            object.setLocation(o.x - 23, o.y - 23);
            object.setBackground(Color.WHITE);
            this.repaint(); //this = JPanel

      

        
        
        
      

    

}

and the overridden paint code

@Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (isOpaque()) {
            if (object.type == 2) { //tarnsition
                g.drawImage(transition, 0, 0, this);

            } else if (object.type == 1) {
                boolean test = g.drawImage(place, 0, 0, this); //place
                g.drawString(object.loadTokens(), 3, 27); // 1,2,3,4...
            }
        }

    }

      

        
        
        
      

    

I tried to call this.revalidate - after FOR EACH LOOP - didn't help, the only way that works is to navigate with the window somehow, oddly enough, this problem only exists @Windows, my college is developing this exactly the same application on Linux and it doesn't run into graphical problems.

I know there have been so many topics like this, but I honestly couldn't figure out the solution.

Thanks for the answer, Osiris