Java Tutorial: Learn Java Programming

Java is a general-purpose programming language used to build software, web and mobile applications. This Codecademy course introduces the language to people with no prior experience. You start with the basics: printing text, storing information in variables, and using conditionals to make decisions. The course then moves into object-oriented programming, teaching you how to organise code with classes and objects, handle inheritance, and manage polymorphism. You will work with arrays and ArrayLists to store collections of data, write loops to repeat actions, and call common String methods to manipulate text. Later modules cover two-dimensional arrays, debugging techniques, and how to structure code with static methods and encapsulation. By the end, you will have built several small Java projects that demonstrate core programming concepts.

The course takes a hands-on approach. Each concept is followed by an interactive coding exercise where you write real Java code and get immediate feedback. The syllabus follows a logical progression: starting with Hello World and variables, then advancing to object-oriented principles such as inheritance and polymorphism, and finishing with debugging and two-dimensional arrays. The final project asks you to combine the topics you have learned into a complete, runnable program.

At the end of the course you will be able to write simple Java applications from scratch, understand how object-oriented code is structured, and debug common errors. You will also have a portfolio of small projects that show you can handle variables, loops, arrays, and object-oriented design. The course does not cover advanced topics such as graphical user interfaces, network programming, or enterprise frameworks; learners who want those should look at the Udemy alternatives listed on the Java courses hub.

This course is free to audit, takes approximately 17 hours to complete, and is designed for beginners. A certificate of completion is available if you upgrade. The language of instruction is English and the pace is self-paced, so you can spread the work over as many days as you need.