ABOUT JAVA:
==========

WHAT IS JAVA?
=============
FOUNDER : JAMES GOSLING
YEAR: 1991
FOR: DIGITAL DEVICES
EARLIER NAME : OAK SYSTEM
OFFICIAL LAUNCH : 1995, RENAMED TO JAVA
FROM 2010: ORACLE

P1	P2 ===> COMMUNICATE 
	TELUGU, ENGLISH, HINDI ETC.

P1 ============> COMPUTER
		BINARY ==> DATA COMBINATION WITH 1'S AND 0'S ==> DIGITAL LANGAUGE
	PROGRAMMING LANGUAGE
		JAVA, PYTHON, C++, C, C#, PHP, RUBY, ETC.

WHY JAVA?
=========
1) HIGH LEVEL PROGRAMMING LANGUAGE

ex:

movie-1:
	if(reviews & views == good)
	{
		prefer "movie-1"
	}

movie-2:
	else
	{
		prefer = "movie-2"
	}

2) General Purpose Programming Language
	1) Desktop Applications
	2) Web Applications
	3) Distributed Applications

Phonepe/Paytm ==> Check Balance ==> UPI Id

Phonepe ====> all bank apps
Phonepe ====> ICICI Bank ==> Bank Server
	UPI

Java is available in three types:
	1) J2SE/JSE ==> Java To Standard Edition
	2) J2EE/JEE ==> Java To Enterprise Edition
	3) J2ME/JME ==> Java To Micro Edition

3) Open Source
4) Freeware
5) Portable
6) Easy Syntax

In C:
int *p = &a;

LTS ==> Long Term Support
Java-8, Java-11, Java-17, Java-21

Oracle ==> time of support for Java-8 ==> 2026
Java-11 ==> Update, Support
Java-17 ==> Update, Support
Java-21

Software Setup:
===============

1) Check, the java software in your computer using command prompt
	i) open the command prompt
	ii) type a command: "java -version"
	
2) To get the java software, there are three requirements:
	i) Download the java software
		https://www.oracle.com/in/java/technologies/downloads/#jdk17-windows
	ii) Install the java software
		run a command to know whether the java software is installed or not?
	iii) Configure the java software
		Setting of Environment variables (Path Setting)

Java has three components:
	1) JDK ==> Java Development Kit
	2) JRE ==> Java Runtime Environment
	3) JVM ==> Java Virtual Machine


About the Course:
=================
Java Full stack
	1) Frontend
	2) Backend
	3) Frameworks

source file ================> Byte Code =================> EXECUTE FILE ====> OUTPUT
(.java)	    COMPILE         (class files)   JVM		(SYSTEM UNDERSTANDABLE)

{
	......
}