Wrapper Class vs. Primitive datatypes

Question

0.00/5 (No votes)

See more:

Why are there Wrapper Classes if we already have Primitive datatypes??
Eg: we can create an integer variable as
int x = 10;
then why would we use Wrapper class as
Integer x = new Integer(10);

Posted 22-Jan-13 22:49pm

Tamanna9931

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

techgeek from-india · Accepted Answer · 2013-01-22T23:31:00

Solution 1

Primitive data types are not classes in Java. Therefore they do not come with instance variables and methods. This is good for efficiency, but seems to force us in a non-object oriented direction. To accommodate this, there are wrapper classes.

Posted 22-Jan-13 23:31pm

techgeek from-india

Comments

Tamanna9931 23-Jan-13 5:34am

means primitive datatypes make Java not an object-oriented language??? if yes, then primitive datatypes should not be exist in Java,, then why there are primitive datatypes exist in Java??

techgeek from-india 23-Jan-13 5:43am

Java is a OOP language and it is not a pure Object Based Programming Language. Many languages are Object Oriented. There are seven qualities to be satisfied for a programming language to be pure Object Oriented. They are:

•Encapsulation/Data Hiding
•Inheritance
•Polymorphism
•Abstraction
•All predefined types are objects
•All operations are performed by sending messages to objects
•All user defined types are objects.
Java is not because it supports Primitive datatype such as int, byte, long... etc, to be used, which are not objects. Contrast with a pure OOP language like Smalltalk, where there are no primitive types, and boolean, int and methods are all objects.

CPallini 23-Jan-13 8:00am

Performance?
http://stackoverflow.com/questions/4624933/comparing-performance-of-int-and-integer

Side note: OOP is not a panacea.

Tamanna9931 23-Jan-13 5:53am

Thanx....