What is Java?

• Java is a High-level, object-oriented programming language.
  • High-level: A language that is easy for humans to read, write, and understand (close to English).
  • Object-oriented: A way of programming where everything is designed using real-world objects like Student, Car, or Bank.
  • Programming language: A language used to give instructions to a computer to perform tasks.

Types of Java Editions

There are total 3 editions in Java which are as below :-

• 1. Java Standard Edition (Java SE)
  • Core Java platform used to build desktop, console, and basic applications.
  • Includes JVM, core libraries, and fundamental APIs.
• 2. Jakarta Enterprise Edition (Jakarta EE) (formerly Java EE)
  • Used for web applications and enterprise-level applications.
  • Supports technologies like Servlets, JSP, REST APIs and Microservices.
• 3. Java Micro Edition (Java ME)
  • Used for embedded systems and resource-constrained devices.
  • Common in IoT, smart cards and small devices.

History of Java

Below is the basic history of Java :-

Use of Java

Below are some uses of Java :-

•   Enterprise Applications
  • Java is widely used in large-scale enterprise systems.
  • Used in banking, finance, ERP, CRM and inventory management systems.
  • Preferred because of its stability, scalability and reliability.
•   Web Applications
  • Java is extensively used for server-side web development.
  • Technologies include Servlets, JSP, Spring and Spring Boot.
  • Commonly used to build secure and scalable web applications.
•   Backend & Server-side Applications
  • Java is a popular choice for building REST APIs and microservices.
  • Used in distributed systems and high-traffic backend services.
  • Common in enterprise and cloud-based architectures.
•   Android Mobile Applications
  • Java is used to develop Android applications using the Android SDK.
  • Many existing Android apps are built using Java.
  • Still widely supported, though newer apps may also use Kotlin.
•   Cloud-based Applications
  • Java is used to build backend services deployed on cloud platforms.
  • Commonly deployed on AWS, Google Cloud and Microsoft Azure.
  • Used for scalable and distributed cloud systems.
•   Big Data Technologies
  • Java is heavily used in big data frameworks.
  • Technologies like Hadoop are written in Java.
  • Used for large-scale data processing.
•   Desktop Applications
  • Java can be used to create desktop software.
  • Technologies include JavaFX and Swing.
  • Usage is moderate compared to web and enterprise applications.
•   Software Development Tools
  • Many popular IDEs and development tools are built using Java.
  • Examples include Eclipse, NetBeans and IntelliJ IDEA.
  • Mostly relevant to developers and development environments.
•   Embedded Systems & IoT
  • Java ME is used in embedded devices and IoT systems.
  • Applied in smart cards, sensors and small devices.
  • Usage is limited compared to enterprise applications.
•   Scientific & Research Applications
  • Java is used in simulations, research tools and scientific computing.
  • Chosen for its reliability and portability.
  • Limited to specific academic and research use cases.
•   Game Development
  • Java is mainly used for simple, educational and learning-based games.
  • Technologies include JavaFX and Swing.
  • Rarely used for high-end commercial game development.