Q) What is a constructor?

A)

A specialized method of a class is known as constructor. A constructor is not the behavior of the object. Only instance methods of the class are only behavior. A constructor is different from an instance method in the fallowing areas.

1. Name

2. Return type

3. Type of calling

4. Time of calling

5. Frequency of calling

6. Purpose

A constructor is a specialized method of a class whose name and class name is same. And doesn’t have any return type. Not even void.

Ex:
class A

{
     A ()

        {

         }//constructor

}

Note :

If we give return type to the constructor, it will no more be acting as constructor. It becomes a normal method.

Ex:
class a

{
     Void a ()

        {

         }//instance method, not a constructor

}

Additional:

Normal method and class name may have same name. But the difference is the constructor. Does not contain return type, the normal method contain return type.