According to definition of an object "It is an entity that can maintain its
state .... ".
No in Java (and also in C# for that matter) I can make class that cannot
maintain its state, but can still exist as an object in the Java world, for
e.g.,

class Test {
public void aFunc() {
System.out.println("I cannot maintain my state, as I don't
have any variables!!!");
}
}

Can be instatiated as an object (I can write Test a = new Test();
a.aFunc();).
Now this object has no variable/attribute, so it cannot maintain its state
over time. But java still allows its object to be created. According to me
this is an illegal object, or direct voilation of the definition.

I think that any claims for Java/C# being an OOP language should be taken
back.