Java supports the runtime polymorphism?

Java supports polymorphism of the duration, but will fail if the overridden method is a static method?

This isn't method substituent. He is hiding method.
A nonstatic method overridden ignores the reference type and uses the type of the object.
A hidden static method does not take into account the type of the object and only use the type of the reference.

Try this and you can see the type of the object is ignored (it is not even check to see if it is null)

Animal.bark();
Dog.bark();

Animal a = null;
Dog d = null;
a.bark();
d.bark();

Tags: Java

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