Print This Article Post Comment Add To Favorites Email to Friends Ezine Ready

A Variable Stores Data On The Basis Of Datatypes In Java

By: Infocampus Home | Computers-and-Technology


Introduction :
Datatypes defines the type of data that a variable can store .
Based on the data type of a variable, the operating system allocates memory and decides what can be stored in the reserved memory. Therefore, by assigning different data types to variables, we can store integers, decimals, or characters in these variables.
About Datatypes :
Datatype is a spacial keyword used to allocate sufficient memory space for the data, in other words Data type is used for representing the data in main memory (RAM) of the computer.

There are two types of data types are available in Java '
1)Primitive Data Types
2)Reference/Object Data Types/Non primitive java course in bangalore data types

Primitive Data Types :
Primitive datatypes are the datatypes those are already defined in java.
These are eight in numbers . Primitive datatypes are predefined by the language and named by a keyword.
These are byte , short , int , long , float , double , Character , boolean
byte
-Byte data type is an 8-bit signed two's complement integer
-Minimum value is -128( i.e.- 2^7)
-Maximum value is 127 (i.e. 2^7-1)
-Default value is 0
-It is used to save space in large java/j2ee classes bangalore arrays, mainly in place of integers, since a byte is four times smaller than an integer.
-Example: byte x = 101 , byte y = -54
short
-Short data type is a 16-bit signed two's complement integer
-Minimum value is -32,768 (-2^15)
-Maximum value is 32,767 (2^15 -1)
-Short data type can also be used to save memory as byte data type. A short is 2 times smaller than an integer
-Default value is 0.
-Example: short x = 10000, short y = -20000
int :
-Int data type is a 32-bit signed two's complement Advanced java training in bangalore integer.
-Minimum value is - 2,147,483,648 (-2^31)
-Maximum value is 2,147,483,647 (2^31 -1)
-Integer is generally used as the default data type for integral values unless there is a concern about memory.
-The default value is 0
-Example: int x = 100000, int y = -200000
long :
-Long data type is a 64-bit signed two's complement integer
-Minimum value is -9,223,372,036,854,775,808(-2^63)
-Maximum value is 9,223,372,036,854,775,807 (2^63 -1)
-This type is used when a wider range than int is needed
-Default value is 0L
-Example: long x = 100000L, long y= -200000L java/j2ee classes bangalore
Float :
-Float data type is a single-precision 32-bit IEEE 754 floating point
-Float is mainly used to save memory in large arrays of floating point numbers
-Default value is 0.0f
-Float data type is never used for precise values such as currency
-Example: float f1 = 234.5f
Double :
-double data type is a double-precision 64-bit IEEE 754 floating point
-This data type is generally used as the default data type for decimal values, generally the default choice
-Double data type should best core java training in bangalore never be used for precise values such as currency
-Default value is 0.0d
-Example: double x = 121.9
Boolean :
-boolean data type represents one bit of information
-There are only two possible values: true and false
-This data type is used for simple flags that track true/false conditions
-Default value is false
-Example: boolean one = true
Char :
-char data type is a single 16-bit Unicode character
-Minimum value is '\u0000' (or 0)
-Maximum value is '\uffff' (or 65,535 inclusive)
-Char data type is used to store any character
-Example: char letterA = 'A'
Reference Datatypes/Nonprimitive datatype :
These are the data types java course in bangalore which are derived from the existing datatypes
-Reference variables are created using defined constructors of the classes. They are used to access objects. These variables are declared to be of a specific type that cannot be changed. For example, Employee, Student , etc.
-Class objects and various type of array variables come under reference datatype.
-Default value of any reference variable is null.
-A reference variable can be used to refer any object of the declared type or any compatible type.
-Example: Employee emp = new Employee(abc);
Some Important points :
-All numeric data types java training center bangalore are signed(+/-).
-The size of data types remain the same on all platforms (standardized)
-char data type in Java is 2 bytes because it uses UNICODE character set. By virtue of it , Java supports internationalization. UNICODE is a character set which covers all known scripts and language in the world.
This is the short description about the datatypes . To get the more knowledge on Core & Advanced java join Infocampus Software Training Institute .




Article Source: http://www.eArticlesOnline.com

About the Author:
Infocampus is the best institute for the java course in bangalore .It provides java training in less fees with the 100% job support . Learn OOPs concept , packages , inner classes , servlet , struts framework , JDBC connectivity in Core & Advanced java class . Infocampus provides best core java training with the real time project .
For java/j2ee classes hard copy of notes is provided for the preparation of students . Fully practical classes are available for Advanced java training .Every weekend free demo classes are available .
To book the seat for free demo class call at : 9738001024 or to get the more information on java course enquire at : http://www.infocampus.co.in/java-training-bangalore.html

Tags:

Please Rate this Article

 

Not yet Rated

Click the XML Icon Above to Receive Computers-and-Technology Articles Via RSS!

Recent Related Articles From Computers-and-Technology

  • Common Wordpress Issues | Fix Wordpress Site
    By: 24/7 wordpress support | wordpress website repair | Oct 17th 2017
    We’re going to talk briefly about security and WordPress error, concepts to help you keep your site safe. Read

  • Brief Description About Applet
    By: Infocampus | Oct 16th 2017
    Applet is an extraordinary kind of program that is introduced in the site page to create the dynamic substance. It continues running inside the program and works at client side. Read

  • New Jersey It Support- Why Help Desk Is Highly Essential For Every Business
    By: Vikram Kumar | Oct 14th 2017
    As one of the online business owners, you have perhaps heard the term- Help Desk. This is such an asset that the entrepreneurs consider for the convenience of users Read

  • It Support For Nj Businesses - Why Should You Have Server Virtualization Solutions
    By: Vikram Kumar | Oct 14th 2017
    When your business has presently a traditional server system, it may be able to run only one application. Lots of companies, having this system, need to make a deployment of a number of servers Read

  • Oops Concept Forms The Basis Of Java Programming Language
    By: Infocampus | Oct 13th 2017

    OOPs concept forms the basis of Java Programming Language, I will try to answer your question in a very layman language.
    OOPs stands for Object Oriented Programming. An approach to do programming which is based on Objects (or real life objects).
    Read

  • Sending Off Harmful Adware & Spyware- Sakshi Computers
    By: Sakshi | Oct 13th 2017
    The Internet is a wonderful tool. It works like a virtual web, connecting everyone within its network from all parts of the globe. With numerous striking highlights, the Internet has turned out to be popular to the point that for all intents and purposes everybody around the globe approaches an Internet association. This po ... Read

  • Anti-virus Support New Jersey - To Protect A Computer System
    By: Vikram Kumar | Oct 13th 2017
    The present online world has allowed lots of companies to alter their business-related approaches. However, any file that you have stored on the web platform may face the risk of the virus Read

  • Offsite Data Backup Strategy In New Jersey- Protect The Lost Files
    By: Vikram Kumar | Oct 13th 2017
    An efficient management of business data is highly important to every company. As the business owners do their transactions with the help of computer systems, they have to ensure the security of all data

    Read

  • Introduction Of Java Jdbc
    By: Infocampus | Oct 12th 2017
    Before JDBC, ODBC API was the database API to relate and execute question with the database. In any case, ODBC API uses ODBC driver which is created in C lingo (i.e. organize destitute and unsecured). That is the reason Java has described its own particular API (JDBC API) that usages JDBC drivers (written in Java tongue). Read

  • Why All Businesses Have Started Depending On Computer & It Support Nj
    By: Vikram Kumar | Oct 12th 2017
    Every business owner wants to increase revenue with smarter and better innovations. Presently, information technology has caused a revolution in almost all the business sectors

    Read


Copyright © 2005-2015 eArticlesOnline, LLC - All Rights Reserved
Terms of Service | Privacy Policy