父类引用子类对象为什么点不出来..........Cat继承Animal

static Animal[] animals = new Animal[3];

public static void main(String[] args) {

animals[0] = new Cat("咖菲猫", "优");
    animals[1] = new Ya("唐小鸭", 2);
    animals[2] = new Shark("小鲨", 0);

for(int i=0;i<animals.length;i++){
System.out.println(animals[i].(这里点不出子类独有的属性));