Free online courseComputer science and Java

Course Description

Turn curiosity about programming into practical skill with a course that connects computer science fundamentals to real Java development. You will start by understanding what computer science is, why programming exists, and how computers actually work—from the CPU and RAM to buses, graphics adapters, and the logic of binary, bits, bytes, and ASCII. This foundation helps you think like a developer instead of just memorizing syntax, making it easier to solve problems and debug with confidence.

From there, you will step into Java with a hands-on setup, learning to work in a professional development environment and write clear, readable code. You will practice how programs are structured through methods and the main entry point, then build comfort with data types, variables, console output, and user input. As you progress, you will learn to control program flow with conditionals and loops, and develop the habit of breaking challenges into simple, repeatable steps that lead to reliable results.

A key focus is learning how to design solutions, not just write lines of code. You will work with algorithms, boolean logic, strings, and characters, and you will discover important Java concepts that prevent common mistakes, such as how object comparison works in practice. Step by step, you will move from small programs to more organized code using Object-Oriented Programming, where you model ideas with classes and gradually introduce reuse through inheritance. Exercises and assignments reinforce these concepts by pushing you to build and connect multiple classes into working projects.

Finally, you will gain the core knowledge behind many technical interviews and real-world systems: data structures. By implementing structures like linked lists, queues, stacks, sets, and binary trees in Java, you will learn what they are good for and how to reason about performance and behavior. By the end, you will have a solid pathway from foundational computer science to practical Java programming—and the confidence to continue into app development, backend engineering, or more advanced software design.