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Java

Robust, battle-tested JVM language for backend systems.

Java Topics

Multithreading

Concurrency models, threads, synchronization, and best practices.

Virtual Threads

Lightweight threads (Project Loom) for massive concurrency.

Collections

Core data structures, performance characteristics, and concurrent collections.

Streams

Functional-style data processing with the Java Stream API.

High-level Overview

Java powers large-scale enterprise backend systems due to its mature ecosystem, strong typing, and performance characteristics on the JVM. It is commonly used with frameworks like Spring Boot to build microservices and resilient server-side applications.

Learning Path

  1. Core Java: OOP, collections, generics, exceptions.
  2. Concurrency & JVM internals: threads, memory model, GC tuning.
  3. Spring Boot & Spring ecosystem: REST, data access, security.
  4. Testing & CI/CD: JUnit, integration testing, pipelines.
  5. Containerization & deployment: Docker, Kubernetes, observability.

Recommended Resources

  • "Effective Java" by Joshua Bloch
  • Spring Guides and official Spring documentation
  • Online courses that include hands-on Spring Boot projects