In java how every class is inheriting from Object class without using extends keyword?

Question

In java how every class is inheriting from Object class without using extends keyword? How can we implement our on java class in the same way?

Its like that because of a specification. No, you cant implement your own class — XtremeBaumer, Feb 26 '19 at 11:35
The compiler fills in "extends java.lang.Object` when there is no `extends`. It is written in the .class file. Only the class Object has no super class. — Joop Eggen, Feb 26 '19 at 11:37

score 1 · Accepted Answer · answered Feb 26 '19 at 11:36

In java how every class is inheriting from Object class without using extends keyword?

By fiat. That is, because the spec says so, in a couple of places (for instance, here). Probably the clearest is §8.1.3:

Given a (possibly generic) class declaration C<F1,...,Fn> (n ≥ 0, C ≠ Object), the direct superclass of the class type C<F1,...,Fn> is the type given in the extends clause of the declaration of C if an extends clause is present, or Object otherwise.

Continuing with your question:

How can we implement our on java class in the same way?

You can't.

In java how every class is inheriting from Object class without using extends keyword?

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