Java

What is Java?

Java is a mature, object-oriented programming language known for running reliably across platforms via the Java Virtual Machine (JVM).

It powers large enterprise systems, Android apps and high-scale back-ends at banks, retailers and tech giants.

Why employers value it

Java remains a backbone of enterprise software, so demand is large and stable. Employers value its performance, strong typing, mature tooling and huge ecosystem (Spring) for building robust systems.

How to learn it

Learn core syntax and object-oriented principles, then build a project with the Spring Boot framework. Understanding the JVM and collections framework rounds out a solid foundation.

• Master syntax, classes, objects and inheritance
• Learn collections, generics and exception handling
• Build a REST API with Spring Boot
• Add a database, tests and deployment

Careers that use it

Java is central to back-end developers, Android developers, enterprise software engineers and big-data engineers.

Market outlook

While newer languages get more buzz, Java's enormous installed base keeps demand high and salaries strong, especially in enterprise and finance.