DIFFERENT ways to create an OBJECT in JAVA || Part 3 || Using Constructor.newInstance()

This tutorial covers how to create an object using newInstance() of Constructor class. we will also learn what are the differences between the Class class newInstance() and the Constructor class newInstance() ?

As we are discussing about different ways to create object in java , and we already covered
how to create an using new keyword

so this is going to be our third way to create an object in java.

The various difference between the Class class newInstance() and the Constructor class newInstance() are

The Constructor class newInstance() used widely across lot of frameworks like Spring,Hibernate,Struts and etc.

When we call Class class newInstance() it internally calls the Constructor class newInstance( ) to create an object.

both the newInstance() called as reflective ways to create an object in java so lets talk more about java reflection in this tutorial.

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Music :
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credits : -

Creative Commons — Attribution 3.0 Unported— CC BY 3.0

music 2 :
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[mdsayeedulhasan]

Your old videos are gold. Music, editing everyhing😊

[santhibatchu]

In the video, you said like constructor class will throw only one exception that is InvocationTargetException. But while creating object it did not added in throws. Why?

[anshul]

Hi,

I have got below error

Constructor<Student> constr =
Student s33=constr.newInstance("A");
//print the object ref to console
System.out.println(s33);

//calling the student class property
s33.colg_id=336;




Exception in thread "main" objecttypes.Student.<init>()
at Source)
at Source)
at


Whats the error ?

[mohammadgouse]

how can we call a constructor with parameters using constructor newInstance method?

[gauravrane]

Bro i didn't found 4th part of this vdo series