父類：
public?class?Animal?{
	public?int?age?=?20;
	public?String?name;
	public?void?eat(){
		System.out.println("動物具有吃東西的能力");
	}
	/*public?Animal(){
		System.out.println("Animal類執(zhí)行了");
	}*/
	public?Animal(int?age){
		this.age?=?age;
		System.out.println(age);
	}

}


子類：
public?class?Dog?extends?Animal?{
	public?static?int?age?=?15;
	public?void?eat(){
		System.out.println("狗具有吃骨頭的能力");
	}
	public?Dog(){
		super(age);
		System.out.println("dog類執(zhí)行了");
	}
	public?void?method(){
		super.eat();
	}
}
我在定義時為什么要在子類的age屬性定義前加static?
既然是父類的age?為何我在調(diào)用method()時輸出的age是15而不是父類的20？