Thursday 8 May 2014

Difference between overloading and overriding in JAVA



1) overloading - compiler decides which method should invoked .
overriding - JVM decides which method should invoked.

2) overloading - is called compile time polymorphism.
overriding - is called run time polymorphism.

3) Overloading - Arguments must change.
Overriding - Arguments should not change.

4) overloading - Return type can change.
overriding - Return type should not change.

5) overloading - Can throw new or broader exception.
overriding - should not throw any exception. but can throw runtime exception.

6) overloading - Reference type determine which method invoked during compile time.
overriding - object type decides which method invoked during run time.




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