Constructors

What are Constructors??

A Constructor is a method which has the same name of the class it is in, it used to initialize the member/instance variables.

Syntax for invoking a constructor: class_name object = new constructor_name()

Features of Constructors:

1. Has the same name as of the class it is in.

2. Used only to initialize the data members (instance variables).

3. Is called by just making an object [class_name object = new constructor_name()].

4. Needs no variable.

5. Is always public.

6. If many constructors are created of the same name the constructor will automatically overloaded when the object is called.

Types of Constructors:

(i) Default Constructor: Used to initialize default values of variables.

(ii) Non-Parametrized Constructors: Used to initialize the instance variables with an empty parameter.

(iii) Parametrized Constructor: Used to initialize the instance variables with the help of parameters, passed at the time of creating an object.

(iv) Copy Constructor: Used to initialize the instance variables by coping the values from another object.