java继承问题 输出

Question

class SubClass extends SuperClass
{
    public String name = "SubClass";
}

class SuperClass
{
    public String name = "SuperClass";
}

public class Demo
 {
    public static void main(String[] args) 
    {
        SuperClass clz = new SubClass();
        //你觉得这里输出什么?
        System.out.println(clz.name);
    }
}

答案为啥是 SuperClass

Answer 1

因为字段上面不会有多态，只有方法才会有多态。直接访问字段时是以声明类型来对待的。这里的Super是声明类型，Sub是实际类型