10. Overloding and overriding.

Question Posted / alb.shah

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10. Overloding and overriding...

Answer / preetham

Overloading :

If you want to use same method in a different ways by using different method signatures.It should be in the same class.
In the below example there is no parameter passed in first time calling but same method we used with passing multiple parameters. This is what overloading means.
Ex: public void FirstMethod(){}
public void FirstMethod(int i, string s){}

Overriding :

It deals with two methods one in a parent class and one in a child class that have the same signature.
The method in parent class should be declared as virtual and the method in the derived class should be declared as override in their method signature. Every virtual method in the parent class should be override in the derived class.
Ex : public virtual void FirstMethod(){}
public override void FirstMethod(){}

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10. Overloding and overriding...

Answer / pinki

Overloading methods
1.They appear in the same class or a subclass
2.They have the same name but, have different parameter
lists, and can have different return types.
An example of an overloaded method is print() in the
java.io.PrintStream class

Overriding methods
It allows a subclass to re-define a method it inherits from
it's superclass
overriding methods:
1. It appears in subclasses
2. They have the same name as a superclass method
3. They have the same parameter list as a superclass method
4. They have the same return type as as a superclass method
5. They have the access modifier for the overriding method
may not be more restrictive than the access modifier of the
superclass method