Java Introduction
Java Programming Languages
What is Java ?
- Java is one of the most commonly used and popular programming languages.
- Java is a robust, object-oriented, secure and high-level programming language.
- it was developed by the sun microsystems in year 1995. Now Oracle Corporation is developing java language.
- James Gosling is known as the father of java.
- It's known for its platform independence, making it sutitable for various applicaions.
Example code:
class Main{
public static void main(String args[]){
System.out.println("Hello Java");
}
}
Application of Java
Java is used on over three billion+ devices. Java can be applied to various platforms. like..
- Desktop Applications (e.g., VLC Media Player, antivirus, Eclipse IDE, etc.)
- Web Applications (e.g., online banking systems, e-commerce websites, social media platforms)
- Enterprise Applications (e.g., customer relationship management (CRM) software, enterprise resource planning (ERP) systems)
- Mobile Applications (e.g., Android applications)
- Embedded Systems (e.g., set-top boxes, home routers, IoT devices)
- Smart Cards (e.g., SIM cards, credit/debit cards)
- Robotics (e.g., robot control software)
- Games (e.g., mobile games, online multiplayer games, minecraft)
Types of Java Applications
There are four main types of Java applications, namely:
- Standalone Application
- Web Application
- Enterprise Application
- Mobile Application
- Known as desktop or window-based applications.
- Traditional software requiring installation on each machine.
- Examples: media players, antivirus programs.
- Java uses AWT and Swing for standalone applications.
- Operates on the server side, creating dynamic pages.
- Uses technologies like Servlet, JSP, Struts, Spring, Hibernate, JSF.
- Examples: email systems, online retail sales, Wikipedia.
- Distributed nature, serving functions like banking systems.
- Offers high-level security, load balancing, and clustering.
- Java uses EJB for enterprise application development.
- Developed for mobile devices like phones and tablets.
- Current technologies: Android and Java ME for mobile app development.
1. Standalone Application:
2. Web Application:
3. Enterprise Application:
4. Mobile Application:
Java Platforms / Editions
There are 4 platforms or editions of Java:
Java SE (Java Standard Edition)
- Purpose: Primarily for Java programming.
- Includes: Core Java APIs (e.g., java.lang, java.io), fundamental topics like OOPs, String handling, Exception handling, Multithreading, I/O operations, Networking, AWT, Swing, Reflection, Collection framework, and more.
Java EE (Java Enterprise Edition)
- Purpose: Geared towards developing web and enterprise applications.
- Built on: Java SE platform.
- Includes: Servlets, JSP (JavaServer Pages), Web Services, EJB (Enterprise JavaBeans), JPA (Java Persistence API), and other enterprise-level topics.
Java ME (Java Micro Edition)
- Purpose: Specifically designed for mobile applications.
JavaFX
- Purpose: Used for creating rich internet applications.
- Feature: Employs a lightweight user interface API.
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