Java 21 Fundamentals: Basics and Object-Oriented Programming — PickAClass
⏱ 2h 42m 📚 27 lessons 🎧 Audio version

Java 21 Fundamentals: Basics and Object-Oriented Programming

Build a strong programming foundation by learning Java 21 syntax, core object-oriented principles, and modern development practices through step-by-step written guides.

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  • 🌐 In English
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About this course

Learning to program can feel overwhelming with complex syntax and abstract concepts. This course simplifies your journey by introducing Java 21, one of the most widely used languages in the software industry today, using clear and structured text-based lessons. You will transition from writing your first line of code to designing robust, maintainable programs using object-oriented principles. Through detailed written explanations and logical code snippets, you will build a solid mental model of how Java executes instructions, manages memory, and structures applications. What you'll learn: Understand foundational Java syntax, variables, data types, and control flow structures; Apply core object-oriented programming concepts including inheritance, polymorphism, and encapsulation; Utilize modern Java features such as record classes, pattern matching, and text blocks to write cleaner code; Manage application data effectively using standard collections and arrays; Handle errors and exceptions gracefully to build reliable, crash-resistant software; Write and organize modular code using modern packaging conventions. The course begins with essential programming terminology, basic setup, and core concepts before moving into practical logic. You will then progress through object-oriented design patterns and modern language features that keep your code clean and efficient. This course is designed specifically for absolute beginners with no prior programming experience, as well as developers looking to transition to Java from other languages. Start your programming journey today and build a dependable foundation in 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.
  • 🎧 Audio version included
    Learn on the go — no screen needed
  • ♾️ Lifetime access
    Come back anytime, no expiry
  • 📱 Phone or computer
    Works anywhere, any device
  • 💸 14-day refund
    No questions asked
  • Short & focused
    2h 42m 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.

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PickAClass
Skills profile · verifiable
Document
Certificate of Mastery
This certifies that
Name Surname
has successfully demonstrated mastery of
Java 21 Fundamentals: Basics and Object-Oriented Programming
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 21 Fundamentals: Basics and Object-Oriented Programming
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.

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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.

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