public static Icon createEmptyFrameIcon() 
{
        if(frame_icon == null)
            frame_icon = new EmptyFrameIcon();
        return frame_icon;
}

 public static Icon getCheckBoxIcon() 
{
        if (checkBoxIcon == null) {
            checkBoxIcon = new CheckBoxIcon();
        }
        return checkBoxIcon;
}

 public static Icon getCheckBoxMenuItemIcon() 
{
        if (checkBoxMenuItemIcon == null) {
            checkBoxMenuItemIcon = new CheckBoxMenuItemIcon();
        }
        return checkBoxMenuItemIcon;
}

 public static Icon getMenuArrowIcon() 
{
        if (menuArrowIcon == null) {
            menuArrowIcon = new MenuArrowIcon();
        }
        return menuArrowIcon;
}

 public static Icon getMenuItemArrowIcon() 
{
        if (menuItemArrowIcon == null) {
            menuItemArrowIcon = new MenuItemArrowIcon();
        }
        return menuItemArrowIcon;
}

 public static Icon getMenuItemCheckIcon() 
{
        if (menuItemCheckIcon == null) {
            menuItemCheckIcon = new MenuItemCheckIcon();
        }
        return menuItemCheckIcon;
}

 public static Icon getRadioButtonIcon() 
{
        if (radioButtonIcon == null) {
            radioButtonIcon = new RadioButtonIcon();
        }
        return radioButtonIcon;
}

 public static Icon getRadioButtonMenuItemIcon() 
{
        if (radioButtonMenuItemIcon == null) {
            radioButtonMenuItemIcon = new RadioButtonMenuItemIcon();
        }
        return radioButtonMenuItemIcon;
}