Java Roadmap 2026
6 phases · 16 weeks · build one project in every phase.
Step-by-step plan
- JDK setup and IntelliJ
- Data types and operators
- Control flow and loops
- Arrays and methods
- JVM basics
Project: Console calculator and student marks report using arrays and methods
- Classes, objects and constructors
- Inheritance and polymorphism
- Interfaces and abstract classes
- String handling
- Exception handling
Project: Bank account management console app with custom exceptions and OOP design
- List, Set and Map
- HashMap internals
- Comparable and Comparator
- Lambdas and streams
- Optional and records
Project: Library management system using collections and stream based search and reports
- Threads and synchronization
- ExecutorService and CompletableFuture
- Virtual threads
- JDBC and PreparedStatement
- SQL with MySQL
Project: Multi-threaded file processor that saves parsed records to MySQL using JDBC batches
- Dependency injection
- REST controllers and validation
- Spring Data JPA and Hibernate
- Transactions
- JUnit and Mockito
Project: Ecommerce product and order REST API with Spring Boot, JPA, MySQL and tests
- Spring Security with JWT
- Kafka messaging
- Resilience4j
- Docker
- CI/CD basics
Project: Two microservices for orders and payments communicating through Kafka, deployed with Docker
Practise each topic
Frequently asked questions
How long does it take to learn Java?
Following this roadmap takes about 16 weeks with regular practice. Working professionals usually need a little longer.
What should I learn first in Java?
Start with phase 1: JDK setup and IntelliJ, Data types and operators, Control flow and loops. Build the phase project before moving on.
How do I know I am job-ready in Java?
When you can finish all phase projects on your own, solve the medium questions in the topic sheets and clear the mock interview comfortably.