Java Roadmap
A curated pathway to master Java programming. Follow these milestones to build a solid foundation and progress into more advanced topics.
Learn the Basics
Object Oriented Programming
Advanced Topics
A curated pathway to master Java programming. Follow these milestones to build a solid foundation and progress into more advanced topics.
Understand how to structure a Java program: the main method, statements, blocks, comments and how to compile and run your code.
Learn about primitive and reference types, type casting, and how Java manages memory for different kinds of data.
Discover how to declare variables, the difference between local and instance variables, and how scope affects visibility and lifetime.
Master conditional statements (if/else, switch) and looping constructs (for, while, do‑while) to control the logic of your programs.
Learn how to define classes and create objects, encapsulate behaviour and state, and understand the principles of object orientation.
Understand how to declare methods, pass parameters, return values, and use instance and class variables effectively.
Dive into inheritance to reuse code through parent and child classes, override behaviour and leverage polymorphism.
Learn how polymorphism allows treating objects of different classes through a common interface to write flexible code.
Explore the Java Collections Framework to work with lists, sets, maps and queues, and understand when to use each collection type.
Harness functional style operations on collections using streams and lambda expressions to write concise and expressive code.
Learn about threads, synchronization, and concurrent utilities to build responsive and scalable applications.
Peek under the hood of the Java Virtual Machine to understand memory management, garbage collection and performance tuning.