When fixing legacy Java code, determine what to change and which behaviors to preserve. In the existing IntelliJ IDEA hands-on exercises, you directly review code changes, while in the 16 newly added theory lessons, you learn about names, functions, duplication, responsibilities, calling contracts, and validation criteria.
122 learners
Level Basic
Course period Unlimited
Reviews from Early Learners
5.0
프로이직러 앵과장
Hello Mr. Bye, first of all, thank you for telling me about various development methods that I was ignorant of. I didn't know much about using various refactoring techniques using IntelliJ. It seems that it is necessary to read the manuals of Springboot and IntelliJ Tool carefully. Also, it was good to use shortcuts through refactoring methods or techniques, but more than anything, it seems good to look at the code level even though I only vaguely understood what TDD is in theory. I learned refactoring methods and shortcuts, but it would be better if there was a way to actually implement test code. I really feel like it comes from the practical experience needed for development. I am a real developer rather than a beginner. Mr. Bye, have a good day in the future and I look forward to the next content :)
5.0
강지우
I think I can write code more easily now that I know about writing clean code. Thank you!
5.0
KimAresen
While using Intellij, I only heard about the refactoring supported by the IDE and only thought about how to use it, but it was good that it actually wrote about the source code that changed while refactoring the example and in what situations the function is used. I am starting to feel more confident that I can slowly proceed with refactoring with the Intellij IDE. Thank you for the great lecture.
Distinguish structural changes from functional changes, and determine which behaviors to retain and what scope to verify.
We assess the boundaries of names, functions, duplication, data, and responsibilities based on the problems in the current code.
Apply IntelliJ IDEA’s refactoring feature and check the changed code and call sites.
Who is this course right for?
Those who can read basic Java syntax and backend code but have difficulty determining the scope of changes in legacy code
For those who know the basics of using IntelliJ IDEA but are unsure when to apply its refactoring features
Those who want to improve the code while checking its existing behavior and how callers use it
Need to know before starting?
Java Basic Syntax
Basic Use of IntelliJ IDEA
General experience reading Java code
Career Verified
201
Learners
8
Reviews
4.8
Rating
2
Courses
Hello.
I’m Hankoff (a programmer who designs code stitch by stitch).
Based on diverse backend development experience, I share ways to understand code and improve it safely.
Even when fixing existing code or using code generated by AI, I strive to be a developer who can explain “why it was written this way” and “what needs to be checked.”
In the course, we will walk through examples step by step, sharing everything from problematic code to improved code, along with the reasons for the changes and the verification process. We will also explain the situations in which to use what you have learned so that you can apply it to your own code.
Main topics covered
The structure of Java code and object design,
Verifying the results of changes through testing
Various Development Topics
Pushing AI to write better code, establishing criteria for reviewing AI-generated code, and so on.
Development Experience
Former) Woowa Brothers — Backend Developer
Formerly at JobKorea — Platform Architecture
Formerly 11st and WeMakePrice — Backend Developer
I plan to engage in a variety of activities on YouTube as well.
If you’re curious about the teaching style before taking the course, check it out on YouTube first. (Go directly to Hankov on YouTube)
I previously operated under the name “Humbly Ripened Rice.”
All
45 lectures ∙ (4hr 12min)
Course Materials:
5. Rename
04:28
7. inline
04:48
9. Extract Method
03:38
10. Change Signature
08:34
All
6 reviews
4.7
6 reviews
Reviews 48
∙
Average Rating 5.0
5
While using Intellij, I only heard about the refactoring supported by the IDE and only thought about how to use it, but it was good that it actually wrote about the source code that changed while refactoring the example and in what situations the function is used. I am starting to feel more confident that I can slowly proceed with refactoring with the Intellij IDE. Thank you for the great lecture.
@KimAresen, Thank you for your kind review. In my long experience of programming, I don't think there's a topic that's as difficult to find an answer to as the act of refactoring ^^ So, I'm glad to hear that it was helpful to you, and I'll work hard to prepare for the next lecture as well. Thank you again.
Reviews 1
∙
Average Rating 5.0
5
Hello Mr. Bye, first of all, thank you for telling me about various development methods that I was ignorant of. I didn't know much about using various refactoring techniques using IntelliJ. It seems that it is necessary to read the manuals of Springboot and IntelliJ Tool carefully. Also, it was good to use shortcuts through refactoring methods or techniques, but more than anything, it seems good to look at the code level even though I only vaguely understood what TDD is in theory. I learned refactoring methods and shortcuts, but it would be better if there was a way to actually implement test code. I really feel like it comes from the practical experience needed for development. I am a real developer rather than a beginner. Mr. Bye, have a good day in the future and I look forward to the next content :)
@Manager Ang, thank you for your first feedback. In offline, I shared this content comfortably with developers, but since it was my first time making an online course, it was more difficult than I thought ^^; while filming the video (in a fluster...) @.@ Nevertheless, thank you very much for your positive feedback. Currently, I am contemplating various roadmaps and thinking a lot about how to provide good guidelines for beginners. I will actively review the comments and work even harder to make the next course better. Thank you. (bow!!)
Reviews 1
∙
Average Rating 5.0
5
It was a helpful lecture
Thank you for your opinion. I will continue to reward you with good content ^^ Thank you.
Reviews 24
∙
Average Rating 4.9
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