Java powers Fortune 500 companies, Android apps, and enterprise backends worldwide. This roadmap takes you from basics to building production Spring Boot applications.
Last updated: March 2026 · 6 Months plan
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Java is the backbone of enterprise software, running in banks, healthcare systems, e-commerce platforms, and government applications. In 2026, Java 21+ with virtual threads and modern features keeps it competitive with newer languages. The Java ecosystem (Spring Boot, Gradle, Maven) is incredibly mature, and the job market is massive — over 35% of backend job listings mention Java. Java developers earn $90,000-$160,000, with senior Spring Boot developers often exceeding $180,000.
Month 1: Java fundamentals — syntax, OOP (classes, inheritance, polymorphism, interfaces), collections framework, and exception handling. Month 2: Advanced Java — generics, streams API, lambdas, concurrency, and file I/O. Month 3: Spring Boot basics — dependency injection, REST controllers, Spring Data JPA, and configuration. Month 4: Database and security — PostgreSQL integration, Hibernate, Spring Security, JWT authentication. Month 5: Advanced Spring — microservices architecture, messaging with Kafka, caching, and testing. Month 6: Deployment and portfolio — Docker, CI/CD, cloud deployment, and building 2-3 portfolio projects.
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