Inheritance without "extends" keyword in Java

Question

Is it possible to inherit a class without using extends keyword in Java ?

Answer 1

Yes. Every class extends Object, whether you add extends Object to the declaration or not.

There are also anonymous classes, such as

Foo foo = new Foo(){
    // some method implemented in here.
};

which can extend a class without extends.

Answer 2

Yes, Each class extend the Object by default without declaration.