Skip to main content
Documents
Share
LinkedIn
Facebook
Twitter
Copy
Java keywordsIntroduction To JavaJava File HandlingJava Language BasicsJava ArraysJava Object-Oriented Programming

Introduction To Java

Java is a versatile, object-oriented programming language designed to be platform-independent, allowing developers to write code once and run it anywhere. It was created by Sun Microsystems (now owned by Oracle) and is known for its reliability, scalability, and security, making it popular for developing applications ranging from mobile apps to large-scale enterprise systems.

What is Java Used For?

Java is used in a wide variety of applications, such as:

  • Web applications: Backend development for websites and web services.
  • Enterprise software: Large-scale systems for business operations.
  • Mobile apps: Especially on Android, where Java is the primary development language.
  • Desktop applications: Cross-platform software for personal computers.
  • Embedded systems: Software for devices like routers, sensors, and smartcards.

Java Editions

Java is offered in several editions, each tailored to specific use cases:

Java SE (Standard Edition)

Java SE provides the core functionality of the Java programming language. It is used for general-purpose applications and includes basic libraries, such as data structures, math functions, and graphical user interface (GUI) tools. Java SE is ideal for desktop software, small applications, and learning Java.

Java EE (Enterprise Edition)

Java EE is built on top of Java SE and provides additional libraries and tools for large-scale, distributed, and transactional applications. It is commonly used for enterprise-level applications such as web servers, databases, and microservices. Java EE is suited for businesses needing robust, scalable systems.

Java ME (Micro Edition)

Java ME is a simplified version of Java, designed for resource-constrained devices such as mobile phones, embedded systems, and IoT (Internet of Things) devices. It is used to develop applications for environments where memory and processing power are limited.