What is Java ? Where Java is used? ? Types of Java Application?

What is Java?

•  Java is a programming language and a platform

• Platform Any hardware or software environment in   which a program runs,known as a platform. Since Java has own Runtime Environment (JRE) and API, it is called platform

 

Where it is used?

• According to Sun, 3 billion devices run java.There are many devices where java is currently used.Some of them are as follows:

o   Desktop Applications such as acrobat reader,media player,antivirus etc.

o   Web Application such as irctc.co.in, etc

o   Enterprise Applications such as banking applications

o   Mobile

o   Embedded System

o   Smart Card

o   Robotics

o   Games etc

Types of Java Application

   There are mainly 4 type of applications that can be created using java:

1)   Standalone Application

a.    It is also known as desktop application or window-based application

b.    An application that we need to install on every machine such as media player, antivirus etc. AWT and Swing are used in java for creating standalone applications

2)   Web Application

a.    An application that runs on the server side and creates dynamic page, is called web application .Currently,servlet,jsp etc  

b.    Technologies are used for creating web application in java

3)   Enterprise application

a.    An application that is distributed in nature, such as banking applications etc

b.    It has the advantage of high level security,load balancing and clustering

c.       In java,EJB is used for creating enterprise applications

4)   Mobile application

a.    An application that is created for mobile devices

b.    Currently Android and Java ME are used for creating mobile applications

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