掌握Java OOP、SOLID原则及11种设计模式，通过4大项目实战与模拟面试，助你攻克高级工程师技术面试。
原始标题：Low-Level Design in Java: OOP, SOLID & 11 Design Patterns
这是一门由Salesforce高级工程师推出的零基础低代码设计（LLD）实战与面试课程，旨在通过Java语言和47节高清视频，深入掌握SOLID原则、11种设计模式及多线程特性。课程聚焦面试核心，教授6步通用框架和UML白板技巧，并通过手写停车场、电梯等4大工业级系统项目，助学员攻克高级工程师技术面试。
Published 8/2026
Created by Anand Rochlani MTS At Salesforce
MP4 | Video: h264, 1920×1080 | Audio: AAC, 44.1 KHz, 2 Ch
Level: All Levels | Genre: eLearning | Language: English | Duration: 47 Lectures ( 24m ) | Size: 596.1 MB
Master 11 Design Patterns, 5 SOLID Principles, 4 OOP Pillars & Ace LLD Interviews with 4 Case Studies + Mock Interview
What you’ll learn
⚡ Master the 4 OOP pillars – encapsulation, abstraction, inheritance and polymorphism – in real Java code
⚡ Apply all 5 SOLID principles and spot violations in any codebase within seconds
⚡ Implement 11 design patterns in Java, each taught as the fix to a problem you have actually hit
⚡ Answer any low level design interview question using a repeatable 6-step framework
⚡ Design 4 complete systems end to end: Parking Lot, Library, Elevator and Chess
Requirements
❗ Basic Java syntax – variables, classes, methods and interfaces
❗ No prior design or architecture experience needed, we start from zero
❗ A JDK and any IDE (IntelliJ, Eclipse or VS Code) to follow along with the code
Description
Stop freezing in LLD interviews. Start designing like a senior engineer.
You’ve been asked “Design a Parking Lot” and didn’t know where to start. Or you opened a codebase and thought “who wrote this mess?” This course fixes both problems.
What you’ll learn
✨ The 4 OOP pillars — Encapsulation, Abstraction, Inheritance, Polymorphism — with real Java code
✨ All 5 SOLID principles — spot violations instantly and fix them
✨ 11 design patterns (Singleton, Factory, Builder, Adapter, Decorator, Strategy, Observer, and more) — each taught 3 ways: the bad approach, a better try, the clean pattern
✨ A 6-step interview framework that works for ANY LLD question
✨ UML class diagrams — draw professional designs on a whiteboard in minutes
✨ 4 complete case studies: Parking Lot, Library, Elevator, Chess — requirements to working code
✨ Java power tools: Rich Enums, Records, Thread Safety, Atomic operations
✨ A full 45-minute mock interview simulation
How this course is different
✨47 bite-sized lessons — each under 10 minutes. No 2-hour lectures. Learn in your lunch break.
✨Theory + Coding split — every lesson has Part 1 (concept in 4 min) and Part 2 (real code in 5 min)
✨THE MESS vs THE FIX — we always show the ugly code first, then the clean version. You see the contrast instantly.
✨Patterns taught as solutions, not definitions — each pattern starts with a problem you’ve actually faced
✨Practice, not just watching — section quizzes, auto-graded Java coding exercises and open-ended design assignments after every major block
✨Interview-ready — the 6-step framework, 15 practice problems and a full mock interview prepare you for FAANG-level design rounds
Who this course is for
⭐ Software engineers preparing for LLD, OOD or object-oriented design interview rounds
⭐ Java developers who want to write cleaner, more maintainable and more extensible code
⭐ Computer science students meeting object-oriented design for the first time
⭐ Anyone who has been told their code works but is hard to maintain
⭐ Backend engineers moving from writing features to designing them
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