Java developer
Learn methods, records and collections before concurrent service patterns.
Your goal
Test inventory invariants and explain request coalescing.
Use each checkpoint as evidence: solve an exercise without the solution open, explain its edge cases, and revisit a failed concept the next day. Course completion records practice; it is not an accredited qualification.
Java · From methods to reliable programs
Six guided lessons from language fundamentals to a tested program. Read the example, run it in the stated environment, then complete the extension checklist.
6 lessons · 170 minutes of guided material, plus project and revision time.
Open syllabus →Java · Coalesce concurrent cache loads
One in-flight operation per key prevents duplicate expensive work.
1 lessons · 50 minutes of guided material, plus project and revision time.
Open syllabus →Final review
- Demonstrate a working example and a deliberately failing case.
- Explain one design trade-off and the expected time and memory costs.
- State which checks ran automatically and which required manual review.
- Keep a short project README with setup steps, limitations and your next improvement.
Open your personal study plan to review weak concepts and schedule the next session.