JAVA Introduction

WHAT IS JAVA :

• Java is a general-purpose, class-based, object-oriented programming language. 
• It is a computing platform for application development. Java is fast, secure, and reliable, therefore. 
• Initially it was launch by Sun Micro systems and then bought buy Oracle
• Java uses the concept of WORA(Write Once Run Anywhere)

   It is used for:

1. Desktop application
2. Mobile application
3. Games
4. Web application 

WHO IS CREATED JAVA PROGRAMMING:

Java is created by " James Gosling "

JAVA DOWNLOAD STEPS IN WINDOWS :

• Go to https://www.oracle.com/

• Click products and scroll down hardware and software click "java"

• Click Download java 

• Scroll down click windows  

• click x64 installer link https://download.oracle.com/java/19/latest/jdk-19_windows-x64_bin.exe ( sha256) download will be start

 Successfully downloaded java 

JAVA INSTALL STEP IN WINDOWS

• Open java  Download file loaction  

• Click jdk installer or open with run as Administrator

• jdk installer will be run and click next

• Choose install file loaction and click next 

• Install process will be started 

• After finish process click close

Installed successfully .

WRITE A SIMPLE PROGRAM AND RUN  

• Open note pad

• Type a program 

public class Main 

{

  public static void main(String[] args) 

{

    System.out.println("Hello World");

  }

}

• click file and click save or ctrl+s to save your file 

• Save your file name  to class name  . This program class name is "main" so you save file "main.java " 

• open save location and type search bar to "cmd" or open "cmd command prompt"

• Type " javac main.java" to compile a program
• Type "java  main" to run program
• Out put show successfully "Hello world"