Introduction
Java is one of the most popular and powerful programming languages in the world.
From enterprise applications and banking systems to Android apps and cloud-based microservices, Java is everywhere.
In this first week of our Weekly Java Blog Series, we’ll cover the foundations of Java, so even absolute beginners can start confidently.
By the end of this article, you will understand:
What Java is
Why Java is still relevant
How Java works internally
The difference between JVM, JRE, and JDK
How to write your first Java program
What Is Java?
Java is a high-level, object-oriented, platform-independent programming language developed by Sun Microsystems in 1995 (now owned by Oracle).
Key Features of Java
Platform Independent
Object-Oriented
Secure
Robust
Scalable
High Performance
Java follows the philosophy:
Write Once, Run Anywhere (WORA)
This means Java code can run on any system that has a Java Virtual Machine (JVM).
Why Java Is Still Popular in 2025
Despite many new languages, Java remains a top choice because:
Used by millions of companies
Huge ecosystem & libraries
Strong community support
Excellent performance
Backed by frameworks like:
Spring Boot