Java is a platform-independent, object-oriented programming language that offers features like simplicity, security, and robust management through the Java Virtual Machine (JVM). It was initiated in 1991 for interactive television and has evolved through various versions, with JDK 1.0 released in 1996. The architecture includes components such as JVM, Java Runtime Environment (JRE), and Java Development Kit (JDK) which facilitate the execution and development of Java applications.

1. Java 1
Kadarkarai Selvam. I

2. Why JAVA
● JAVA is platform independent
○ Code is compiled by Compiler and Converted into bytecode
○ This bytecode is platform independent. i.e., Write Once and Run Anywhere
● Object Oriented Programming Language
○ Thinking, Designing and Coding everything as objects
○ Less code, Create usable code, easily understandable code
● Simple and Memory management are taken care by JVM
● Java is secure as the code runs in JVM

3. JAVA - History
●Originally designed for interactive television. But it is too early
●Initiated in 1991, by Green Team led by James Gosling
●Name changed from GreenTalk, Oak and Java.
●JDK 1.0 was released on January 23, 1996
●Main Pricinple of Creating Java
Simple, Robust, Portable, Platform-independent, Secured, High Performance, Multithreaded,
Architecture Neutral, Object-Oriented, Interpreted, and Dynamic

4. JAVA Features

5. Operating System
C++ Application
Operating System
Java Virtual Machine
Run Time Environment
Java Application

6. JAVA
❖ JDK (Java Development Kit) is referred to Java SE (Standard Edition)
❖ From Java 11, Oracle provides OpenJDK (free) and Oracle JDK (commercial)
❖ OpenJDK is a free and open-source implementation of JAVA SE Platform
Edition
❖ Oracle provides long term support for its releases. On the other hand,
OpenJDK supports the changes to a release only until the next version is
released

7. JAVA Architecture

8. JAVA
❖ Java Virtual Machine (JVM) : Place where Java Bytecode will run
❖ Provide Run time environment and Execute the code
❖ Java Run Time Environment (JRE) : Contains libraries and files used by JVM
❖ Java Development Kit (JDK) : Used to develop Java Application and Applets
❖ JDK is an Implementation of Standard Edition (or) Enterprise Edition (or)
Micro Edition
❖ JDK contains compiler (javac), loader (java), documentation (Javadoc)

9. Java Installation
●We can use Java 8
https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview
.html
https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html

10. Java Installation
●Add the Environment Path
○Path = C:Program FilesJavajdk 1.8.0.271bin
○Classpath = C:Program FilesJavajdk 1.8.0.271lib
●Verification of Path
○Java –version
○javac

11. Thank you
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