return null;
return new Icon() { public int getIconHeight() { return 10; } public int getIconWidth() { return 10; } public void paintIcon(Component c, Graphics g, int x, int y) { if (c instanceof AbstractButton) { UIDefaults defaults; defaults = UIManager.getLookAndFeelDefaults(); Color hi = defaults.getColor("CheckBox.highlight"); Color low = defaults.getColor("CheckBox.darkShadow"); Color sel = defaults.getColor("CheckBox.foreground"); Color dim = defaults.getColor("CheckBox.shadow"); Polygon check = new Polygon(new int[] {x+3, x+3, x+8}, new int[] {y+5, y+9, y+3}, 3); AbstractButton b = (AbstractButton) c; Color saved = g.getColor(); if (b.isEnabled()) { g.setColor(low); g.drawRect(x, y, 10, 10); g.setColor(hi); g.drawRect(x+1, y+1, 10, 10); if (b.isSelected()) { g.setColor(sel); if (b.isSelected()) { g.drawLine(x+3, y+5, x+3, y+8); g.drawLine(x+4, y+5, x+4, y+8); g.drawLine(x+3, y+8, x+8, y+3); g.drawLine(x+4, y+8, x+8, y+3); } } } else { g.setColor(hi); g.drawRect(x, y, 10, 10); if (b.isSelected()) { g.drawLine(x+3, y+5, x+3, y+9); g.drawLine(x+3, y+9, x+8, y+3); } } g.setColor(saved); } } };
  public static Icon getCheckBoxIcon()  {    return null;  }