코딩으로 학습하는 리팩토링
백기선
리팩토링은 소프트웨어 엔지니어가 갖춰야 할 기본적인 소양 중 하나입니다. 이 강의는 인텔리J와 자바를 사용하여 보다 실용적인 방법으로 다양한 코드의 냄새와 리팩토링 기술을 설명하고 직접 실습할 수 있도록 준비했습니다.
Basic
리팩터링, Java, IntelliJ IDEA
BEST
Effective Java Complete Guide Part 2
Learn “Effective Java,” the ultimate Java learning course, more easily and completely. By taking this course, you can improve not only your Java programming knowledge and skills, but also your learning ability.
Reviews from Early Learners
What you will learn!
How to make classes and interfaces easy to write, robust, and flexible
How to take advantage of generics and minimize their disadvantages
Microsoft Senior Developer, Baek Gi-seon
Effective Java with extraordinary depth 🚢
The end of Java study, Effective Java.
Effective Java ?
Every Java developer tries to study it at least once.
"Effective Java," a book that no one can conquer
This course will give you a complete guide.
High-level backend developer
For the you who wants to be.
"Effective Java 3/E" is a book recommended to all Java developers, but paradoxically, it's not a book that everyone can easily learn. Even to properly understand the first item, you need background knowledge on "enumeration types," "flyweight patterns," "static methods in interfaces," "service provider frameworks," and "reflection." Without this background knowledge, it's difficult to fully grasp the book's content. While it's certainly challenging to learn, the rewards of mastering each chapter are truly remarkable.
Understanding the contents of "Effective Java" will significantly enhance your skills and knowledge, opening up new perspectives. Even if you study or use other programming languages, it's worth considering . (Just like I did, I diligently studied this book, but now work at Microsoft using C# and PowerShell.)
Challenging the series
Effective Java Complete Guide
Effective Java Complete Guide - Part 2 series in progress
"Effective Java" is divided into five parts. This lecture, Part 2, covers Chapter 4, "Classes and Interfaces," and Chapter 5, "Generics."
For developers or students who find "Effective Java" challenging, or those who want to learn more thoroughly, we'll summarize each item with code and provide background knowledge to help you learn each item. Your "Effective Java" study will be much more enjoyable, easier, and more beneficial.
For those who need in-depth learning of Java .
This course is not for beginners or complete beginners in programming. It's for developers working with Java, developers who have completed basic Java studies, or students who want to improve their skills through advanced, in-depth study. If you've taken the following course or completed a similar course, you're welcome to take this course. (For more information, please refer to Section 0 - Introduction to the Course.)
Required learning courses
Recommended Course of Study
Suggested in the lecture
4-Step Learning Sequence
This course covers 14 topics covered in Parts 2 and 3 of Effective Java, providing 30 pieces of background knowledge for a thorough approach. Effective Java also provides additional source code to help you understand parts of the book that weren't covered in text. The recommended learning method is as follows:
Step 1
I bought "Effective Java" as a textbook and read one item first.
Step 2
Take the "Key Summary" class for the item corresponding to "Effective Java Complete Guide Part 1."
Step 3
Take the "Perfect Strategy" class that follows and continue to study the areas you are lacking.
Step 4
If you organize what you have learned additionally on your personal blog and leave a link on the "Questions and Answers" bulletin board, we will review it.
Complete strategy for each of the 14 items,
Learning Curriculum 📚
Item 15. Minimize access permissions for classes and members.
- Information hiding
- Principles for Using Access Modifiers
- Java Platform Module System
Item 16. In public classes, use accessor methods, not public fields.
- Performance issues with the Dimension class that exposes its internals
Item 17. Minimize the possibility of change.
- Immutable class
- Pros and Cons of Immutable Classes
- final and the Java memory model
- java.util.concurrent package
- CountDownLatch
Item 18: Use composition over inheritance.
- Disadvantages of inheritance
- Advantages of composition
- Decorator pattern
- The callback framework and the self problem
Items 19-20. Design and document inheritance. Otherwise, prohibit inheritance.
- @implSpec
- Advantages of the interface
- Interfaces and abstract skeletal classes
- Template Method Pattern
- Default methods and Object methods
Item 21. Design interfaces with the implementer in mind.
- Things to keep in mind when adding default methods
- ConcurrentModificationException
Item 22. Use interfaces only to define types.
- Never use interfaces to define constants!
- How to define a constant
Item 23. Use class hierarchies rather than tagged classes.
- Disadvantages of tagged classes
- Using Hierarchical Structure
Item 24. Make member classes static whenever possible.
- static member class
- Non-static member class
- anonymous classes
- Local class
- Adapter pattern
Item 25. Keep only one top-level class per file.
Item 26. Do not use low type.
- Glossary of generic terms
- Why Use Parameterized Types?
- GenericRepository
Item 27. Remove unchecked warnings.
- Unchecked warning
- @SuppressWarning
- Annotation
Item 28. Use lists rather than arrays.
- Covariant vs. Invariant
- @SafeVarangs
Item 29. If possible, make it a generic type.
- Converting code that uses arrays to generics
- Bounded type parameters
Item 30. If possible, make it a generic method.
- Generic singleton factory
- Recursive type constraints
Item 31. Increase API flexibility by using bounded wildcards.
- PECS (Producer-Extends, Consumer-Super)
- wildcard
- Type inference
Item 32. Be careful when using generics and variable arguments together.
- Generic variable arguments
- ThreadLocal
- ThreadLocalRandom
Item 33. Consider type-safe heterogeneous containers.
- Type-safe heterogeneous container
- Type token
- Super Type Token
- Limited type token
A must-read for every Java developer ,
So that we can read together 💌
We provide a guide to help you study Effective Java more easily and thoroughly. It summarizes the core concepts introduced in Effective Java and provides detailed background knowledge necessary for a more complete understanding.
This lecture is the second in the five-part "Effective Java Complete Guide." Please take the first lecture before continuing.
Baek Gi-seon's "Effective Java Complete Guide" Previous Lecture 📖
Recommended for
these people
Who is this course right for?
All developers who use Java in the field
Developers or students who want to master Java
Developers or students who want to learn Effective Java more thoroughly
Need to know before starting?
Java Basics (Must read one of the following books: Java God, Java Essentials, and Head First Java)
The Java: Java 8
More Java: Different ways to manipulate code
Design Patterns Learned Through Coding
Effective Java Complete Guide Part 1
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Learners
4,233
Reviews
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4.8
Rating
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아인슈타인은 "교육이란 사실을 가르치는 것이 아니라, 생각할 수 있는 힘을 기르는 것이다."라고 말했습니다. 그리고 저도 그 말에 깊이 공감하며 강의를 만들고 있습니다.
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54 lectures ∙ (8hr 54min)
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