Java Performance and Data Structures — PickAClass
4.0 (2) ⏱ 3h 📚 30 lessons 🎧 Audio version

Java Performance and Data Structures

Learn to select and implement the right data structures to build fast, scalable Java applications that handle real-world data efficiently.

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  • 🌐 In English
    Lessons, tasks and certificate — all fully in your language.

About this course

Software that works with a handful of examples often fails when faced with thousands of real-world records. Understanding how to manage data efficiently is what separates a basic coder from a professional developer. This course teaches you how to evaluate code performance and choose the most effective data structures for any task. You will move beyond basic syntax to understand the underlying mechanics of how Java handles information at scale. What you'll learn: - Understand Big O notation to analyze and predict code efficiency - Compare and implement core Java collections including Lists, Sets, and Maps - Use modern Java Records and the Streams API for efficient data transformation - Apply basic benchmarking techniques to measure execution time accurately - Identify performance bottlenecks in common algorithms - Balance memory consumption with processing speed for optimal results The curriculum starts with foundational definitions of complexity and performance measurement before diving into the practical application of the Java Collections Framework. You will read through written explanations and apply your knowledge through text-based exercises. This course is designed for beginners; no previous experience with data structures or performance optimization is required. Start writing faster, more efficient Java code today.

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
    3h 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 Performance and Data Structures
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 Performance and Data Structures
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 (2)

عائشة بنت سعد SA Verified learner
★ 3 · July 17, 2026

Learned a good amount here. The examples were relevant, though I wished there were a few more practical application tasks. Still, a worthwhile experience.

Emilia Koch CH Verified learner
★ 5 · June 9, 2026

Couldn't have asked for a better learning experience. The structure flowed perfectly, and the examples were incredibly relevant. Highly recommend!

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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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