静态方法不能重写

class Cat{
    protected static String color ="random";

    public void showCatColor(){
        System.out.println("Cat : "+color);
    }
    public static void staticShowColor(){
        System.out.println("Cat static  : "+color);
    }
}

class WhiteCat extends Cat{
    protected static String color ="white";

    public void showCatColor(){
        System.out.println("WhiteCat :"+color);
    }
    public static void staticShowColor(){
        System.out.println("WhiteCat static :"+color);
    }
}

    public static void main(String[] args) {
        
//            WhiteCat whiteCat = new WhiteCat();
//            Cat cat = whiteCat; 
//            cat.staticShowColor();
//            cat.showCatColor();
            /**
             * Cat static  : random
             * WhiteCat :white
             */
        
        
//        Cat cat = new WhiteCat();
//        WhiteCat whiteCat = (WhiteCat)cat;    //其实和上面的那段代码是相同的         
//        cat.staticShowColor();                //都是调用父类的静态方法，输出父类的静态变量
//        cat.showCatColor();        
        /**
         * Cat static  : random
         * WhiteCat :white
         */
            
            
//            Cat cat = new Cat();
//            WhiteCat whiteCat = cat; //cannot convert from Cat to WhiteCat
//            cat.staticShowColor();
//            cat.showCatColor();

    }