Introduction of Java

Introduction

Java is a powerful, versatile, and simple general-purpose programming language.
Java is a full-featured general-purpose programming language that is used for developing platform-independent software (applications) running on desktop computers, mobile devices, and servers.
first released by Sun Microsystems (later acquired by Oracle Corporation) in 1995.
The development of Java started in the early 1990s by a team of engineers led by James Gosling, Patrick Naughton.
It was initially designed for use in interactive television,but it was too advanced technology for the digital cable television industry at the time.
The project was initially known as "Oak" but was later renamed to Java.
In 1995, Sun Microsystems released the first version of Java, called JDK 1.0, to the public.
The latest version of Java is Java 20 or JDK 20 released on March, 21st 2023 .

ToolChain of Java

Java Toolchain

Editions of Java Platforms

They are as follows:

1. Java SE (Standard Edition):

This edition is used to develop client-side applications.
It is used to develop applications for desktop, communication, and user interface.
It Use to create StandAlone Application .
StandAlone Application means if we design & execute any Application without using client server architecture then application is known as standalone application.

“Java Standalone Application” does not require the Internet. It runs on a local machine.

Ex : Calculator , Notepad .(those application which are not need server or internet to play ).

2. Java EE (Enterprise Edition):

This edition is used to develop server-side applications such as Java servlets, JavaServer Pages (JSP), and JavaServer Faces (JSF).
It is use to create Enterprises Application or Distrubuted Application .
Enterprises Application or Distrubuted Application means if we design & execute any Application using on the basis of client server architecture then application is known as Enterprises Application or Distrubuted Application.
In other words, it is used to develop web-based, messaging, distributed, and enterprise applications.

Ex : Instagram , gmail .

3. Java ME (Micro Edition):

This edition is used to develop applications for mobile devices, such as cell phones. It is also used to develop Personnel Digital Assistants, Setup Box, and printers applications.
It use to create Mobile Base Application .
Mobile Base Application means if we design & execute any Application using on the basis of mobile hardware then application is known as mobile base Application .
we can both standalone & Enterprise application in Micro Edition.

Datatype in Java

Datatypes

Datatypes size