Kal

    void makeTransparent(Component component,int alpha) {    	component.setBackground(changeAlpha(component.getBackground(), alpha));    	component.setForeground(changeAlpha(component.getForeground(), alpha));    	if (component instanceof Container) {    		Container container=(Container)component;    		for (int i=0; i<container.getComponentCount(); ++i)    			makeTransparent(container.getComponent(i),alpha);    	}    }