Java OOPC -Java Constructor

 

Java Constructor

 

 

In Java, a constructor is a special type of method that is used to initialize objects. It is called when an object of a class is created, and its primary purpose is to set initial values for the object's attributes.

 

In further we can tell constructor is a method that create using the class name and it have not any return type while constructor is work on the time when object is called.

It is a special type of method which is used to initialize the object.

 

In simply pointed view we can understand constructor is what

  • Method
  • Name same of the class name
  • No need return type

 

 

There are two type of constructors mainly,

1.Parameter less constructor

2.Parameterize constructor





1. Parameter less constructor

 

In other way we can tell it as default constructor. If a class does not have any constructor defined, Java provide the parameter less constructor.

In this constructor there is no parameters and perform a basic initialization.

 

 

2. Parameterize constructor

 

Constructor take parameters, allowing for the initialization of object with specific values.

Parameterized constructor provide flexibility in object creation.

In there constructor’s parameter list working completely according to the parameter list and inside the object’s parameter list arguments should be passed.

In according to the constructor’s parameters, object’s parameters should be passed.

 

 




 

 

If we got into know more about parameterize constructor, Below shows a example for it.







In here, student is the parameterized constructor and firstname, lastname, age be the asked arguments on there. Ihechikara , abba,100 are the arguments passed to it.

 

 

In below example show the parameter less constructor student,t here’s no parameter on there and object is created for it and there is no arguments to passed through.

 






 

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