Fission theory. Fission Theory-A theory for the origin of the Moon in which the Moon consists of matter that was flung from the primitive Earth because of the Earth 's rapid rotation ...
Method overloading is the example of compile time polymorphism. Method overriding is the example of run time polymorphism. In java, method overloading can't be performed by changing return type of the method only. Return type can be same or different in method overloading.
Rules for method overriding: 1  In java, a method can only be written in Subclass, not in same class. 2  The argument list should be exactly the same as that of the overridden method.  The return type should be the same or a subtype of the return type declared in the original overridden method in the super class.