code: public static void fillCircle(Graphics g, int centerX, int centerY, int diam, Color color){
  		Color c = g.getColor();
  		g.setColor(color);
  		fillCircle(g, centerX, centerY, diam);
  		g.setColor(c);
  	}
docs: Draws a circle with the specified diameter using the given point coordinates as center
  and fills it with the given color.
  @param g Graphics context
  @param centerX X coordinate of circle center
  @param centerY Y coordinate of circle center
  @param diam Circle diameter