JavaBeginner
CS50's Introduction to Programming with Scratch
Harvard's CS50 introductory course starting with Scratch and progressing to Java concepts. The most engaging introduction to programming available anywhere.
Free course on MIT OpenCourseWare
MIT's Software Construction in Java (6.005) is a free course on MIT OpenCourseWare teaching software engineering principles through Java: testing, specifications, abstraction, and object-oriented design. It's not just a Java course; it's about how to build software that's correct, easy to change, and easy to understand. After finishing, you can write production-quality Java and apply engineering principles to any language. The main limitation: this is demanding and assumes prior programming experience.
Java is used by 29.6% of professional developers and powers billions of devices through Android and enterprise systems (source: Stack Overflow Developer Survey 2025).
MIT's software engineering course using Java. Covers specifications, testing, abstraction, concurrency, and design patterns. Full lecture notes and problem sets.
JavaBeginner
Harvard's CS50 introductory course starting with Scratch and progressing to Java concepts. The most engaging introduction to programming available anywhere.
JavaBeginner
Codecademy's Learn Java course runs entirely in the browser, so you write and run real Java without installing a JDK first. By the end you can build simple object-oriented programs: classes, inheritance, interfaces, and basic data structures like arrays and ArrayLists. It's a solid pick if you're new to Java specifically, even with experience in another language, since the built-in editor catches syntax errors as you type. Skip it if you already know object-oriented basics elsewhere and just want Java syntax fast: the pacing is patient, not a quick reference. The free tier stops short of a certificate, and a few later exercises nudge toward Codecademy Pro.