Java SE 21 Programming with OOP and Functional Techniques — PickAClass
⏱ 2h 30m 📚 25 lessons

Java SE 21 Programming with OOP and Functional Techniques

Master modern Java SE 21 development by combining structured object-oriented design with powerful functional programming patterns.

  • 💬 AI instructor
    Ask about any lesson and get a clear answer instantly, anytime.
  • 🕐 Start anytime
    No schedules or deadlines — learn at your own pace, whenever suits you.
  • 🌐 In English
    Lessons, tasks and certificate — all fully in your language.

About this course

Modern software development demands both robust structure and clean, readable code. Java SE 21 delivers this balance perfectly, offering powerful tools that blend traditional object-oriented programming with cutting-edge functional paradigms. This comprehensive text-based course is designed to help you write elegant, efficient, and maintainable Java code using the latest platform features. You will transition from basic syntax to writing expressive, production-ready applications. By studying detailed code examples and step-by-step structural explanations, you will learn how to design flexible software architectures and leverage modern language enhancements to solve complex development problems. What you'll learn: - Understand foundational object-oriented principles including inheritance, polymorphism, and encapsulation in modern Java - Implement functional programming techniques using lambdas, streams, and functional interfaces - Use modern Java SE 21 features such as record classes, sealed classes, and pattern matching - Write clean, asynchronous code using modern concurrency basics and virtual threads - Organize and structure your code efficiently using the Java Module System and modern packaging conventions - Apply robust error handling, basic testing with popular frameworks, and debugging strategies to your applications This course begins with core object-oriented concepts and essential syntax before advancing to functional interfaces, stream pipelines, and the latest Java SE 21 features. Each section focuses on readable text explanations and clear code snippets to build your practical skills progressively. This course is ideal for beginners with a basic understanding of programming concepts, as well as developers looking to update their skills to the latest Java standards. Start reading today to elevate your programming capabilities with modern Java.

What you'll get

  • 📜 Certificate of completion
    Add it to your LinkedIn profile
  • 💬 Personal AI tutor
    Stuck on a lesson? Ask your built-in tutor anything, any time.
  • ♾️ Lifetime access
    Come back anytime, no expiry
  • 📱 Phone or computer
    Works anywhere, any device
  • 💸 14-day refund
    No questions asked
  • Short & focused
    2h 30m of practical content

Certificate of completion

Every course you complete on PickAClass issues a credential like this — original, with its own code, verifiable by URL, and detailed about what was actually demonstrated.

P
PickAClass
Skills profile · verifiable
Document
Certificate of Mastery
This certifies that
Name Surname
has successfully demonstrated mastery of
Java SE 21 Programming with OOP and Functional Techniques
Skills demonstrated
Behavioral pattern analysis
Foundational
1.2 hrs
Decision-architecture frameworks
Proficient
1.4 hrs
A/B test design
Proficient
1.7 hrs
Behavioral copywriting
Advanced
1.9 hrs
P
PickAClass — Name Surname
Java SE 21 Programming with OOP and Functional Techniques
Page 2 of 2
Performance detail
Coursework summary
Lessons completed 14 / 14
Practice questions 26 / 28
Assignments submitted 4 (avg 4.5 / 5)
Capstone project Reviewed — 4.6 / 5
Total practice 6.2 hrs
Performance benchmark
Cohort rank Top 12% of 1,625
Time to completion 11 days (median: 22)
Mastery score 91 / 100
Practice-question score 94%
Skill verification Verified Skill Path
Verify this credential
pickaclass.com/certificates/PCC-2026-X4F7-AP19
Issued under the academic standards of PickAClass. Skill levels reflect assessed performance against the course's competency rubric. This is an original credential of this platform.

Reviews

No reviews yet — be the first to share your experience.

Write a review

You'll be asked to sign in after sending — your draft is saved.

Learners also took

Frequently asked

What do I need to take this course? +

Just a phone or computer with internet. No installs, no special hardware.

How do I pay? +

By card via Stripe. We don’t store card details — Stripe handles them securely.

Can I get a refund? +

Yes — full refund within 14 days, no questions asked.

How long will I have access? +

Forever. Once you purchase, the course is yours to revisit anytime.

Will I get a certificate? +

Yes. On completion you'll receive a certificate you can add to your LinkedIn profile.

Built for learners in
Tech Design Finance Marketing Healthcare Education Hospitality Manufacturing