Java Roadmap¶

• Roadmap: https://roadmap.sh/java

1. Learn the Basics¶

• 1.1 Basic Syntax
• 1.2 Lifecycle of a Program
• 1.3 Data Types
• 1.4 Variables and Scopes
• 1.5 Type Casting
• 1.6 Strings and Methods
• 1.7 Math Operations
• 1.8 Arrays
• 1.9 Conditionals
• 1.10 Loops
• 1.11 Basics of OOP

2. Object Oriented Programming¶

2.1 Basics of OOP¶

• 2.1.1 Classes and Objects
• 2.1.2 Attributes and Methods
• 2.1.3 Access Specifiers
• 2.1.4 Static Keyword
• 2.1.5 Final Keyword
• 2.1.6 Nested Classes
• 2.1.7 Packages

2.2 More about OOP¶

• 2.2.1 Object Lifecycle
• 2.2.2 Inheritance
• 2.2.3 Abstraction
• 2.2.4 Method Chaining
• 2.2.5 Encapsulation
• 2.2.6 Interfaces
• 2.2.7 Enums
• 2.2.8 Record
• 2.2.9 Method Overloading / Overriding
• 2.2.10 Initializer Block
• 2.2.11 Static vs Dynamic Binding
• 2.2.12 Pass by Value / Pass by Reference

3. Exception Handling¶

4. Lambda Expressions¶

5. Annotations¶

6. Modules¶

7. Optionals¶

8. Collections¶

• 8.1 Array vs ArrayList
• 8.2 Set
• 8.3 Map
• 8.4 Queue
• 8.5 Dequeue
• 8.6 Stack
• 8.7 Iterator
• 8.8 Generic Collections

9. Dependency Injection¶

10. Concurrency¶

• 10.1 Threads
• 10.2 Virtual Threads
• 10.3 Java Memory Model
• 10.4 volatile keyword

11. Cryptography¶

12. Date and Time¶

13. Networking¶

14. Regular Expressions¶

15. I/O Operations¶

• 15.1 File Operations

16. Functional Programming¶

• 16.1 High Order Functions
• 16.2 Functional Interfaces
• 16.3 Functional Composition
• 16.4 Stream API

17. Build Tools¶

• 17.1 Maven
• 17.2 Gradle
• 17.3 Bazel

18. Web Frameworks¶

• 18.1 Spring (Spring Boot)
• 18.2 Quarkus
• 18.3 Javalin
• 18.4 Play Framework

19. Database Access¶

• 19.1 JDBC
• 19.2 EBean
• 19.3 Hibernate
• 19.4 Spring Data JPA

20. Testing¶

20.1 Unit Testing¶

• 20.1.1 JUnit
• 20.1.2 TestNG

20.2 Integration Testing¶

• 20.2.1 REST Assured
• 20.2.2 JMeter

20.3 Behavior Testing¶

• 20.3.1 Cucumber-JVM

20.4 Mocking¶

• 20.4.1 Mockito

21. Logging Frameworks¶

• 21.1 Logback
• 21.2 Log4j2
• 21.3 SLF4J
• 21.4 TinyLog