simple drawing

[delta770]

i have an array of 100 buttons, with icons (that show properly, without a prob), layout using GridLayout

i have a second method that is supposed to change the button's icon. to a differnet icon, (which is in the corrent path and everything is fine, but it doesn't change. when i do

public void flipTilesToBlank() {
	for (int x = 0; x < 100; x++) {
		aButton[x].setIcon(new ImageIcon ("blank.jpg"));
		aButton[x].paint(aButton[x].getGraphics());
		System.out.println(aButton[x].getGraphics());
		this.update(aButton[x].getGraphics());

		}		
	}

for the System.out.println(aButton[x].getGraphics()); i get 'null'

what method would i use to redraw after i've set the new image icon, (i'm a bit new to java swing, so not exactly sure, i'm trying the update or i'm trying

aButton[x].paint(aButton[x].getGraphics());

nothing works?? WHY

thanx for your help
--770