📺 Watch the Full Series on YouTube
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Free YouTube course — organized by topic for focused learning
This free video course covers Java OCP topics from the 1Z0-829 (Java 17) and 1Z0-830 (Java 21) exam syllabus. Each video focuses on a single topic with code examples, edge cases, and exam-style scenarios.
Pick any topic below to watch the videos in that section. Lessons are short, focused, and exam-aligned — each video typically runs 10–20 minutes.
Primitives, wrappers, strings, StringBuilder, text blocks, date/time API, formatting, time zones.
Section 2Switch statements vs expressions, pattern matching, sealed interfaces, records, loops.
Section 3Constructors, initialization order, inheritance, polymorphism. More videos being added.
Section 4Exception hierarchy, checked vs unchecked, try-with-resources, custom exceptions.