I studied Java once with a book, but I didn't know much about it, so I looked for a different way to study and listened to the lecture.
At first, I was not sure if it was long because it was not much different from the book, but the more I listened, the more I became convinced that I had done well in listening to the lecture. The lecturer explained it with analogies, so I understood it better than when I studied with the book, and I think he explained it in more detail than in the book. So now I feel like I know and understand Java a little bit. And the system where I can ask questions right away is also really good.
I don't usually leave reviews, but if there are people like me who are wondering whether to just study with the book again or listen to the lecture, I wrote this because I wanted to let them know that they won't regret listening to the lecture.
5.0
CHOPAV
90% enrolled
Where else can I take a course like this at this price, ... I'm still a little lacking in writing code on my own... but I'm confident that I can do it if I study hard!!
I'll study hard until I finish the course! Thank you ~!!!!!!!
5.0
woo jung Roh
22% enrolled
I haven't taken all of the classes yet because I'm looking for the parts I need, but I'm leaving a review first because the lectures are really good.
The lecture materials are organized and prepared in a way that's easy to find. When I'm in a hurry, I can just look at the code in Notion, and it's also good for debugging by copying and pasting. (Of course, when I have time, it's best to try it out myself.)
And the examples are fun and well-made. They contain the content that's essential for understanding the concepts, but they're also interesting and provide good stimulation.
This is Yalko's second lecture after JavaScript Reactive Programming. I felt that all of the lecture materials and lecture content were full of useful content without any unnecessary details. Thank you for preparing such a great lecture.
What you will gain after the course
From Java basics to detailed syntax and advanced usage
In-depth theory and practical knowledge of Java
Latest features and syntax based on Java 17
Object-Oriented Programming in Java
Functional Programming through Collections and Streams
Advanced Techniques for Multitasking
Implementing advanced features through reflection
How to use build tools and libraries
Java, from the basics to practical application all in one course!
With Yalco, a YouTuber with 120k subscribers Intensive Java Language Course 🔥
I wanted to create a course that eliminates the need to take any other courses once you've finished it. As a beginner, have you ever felt like something was missing when you jumped into practical work after taking a basic course?
To save you the trouble of searching for advanced courses and content to quench your thirst for knowledge, I have finally completed a course—after long preparation—that digs deep 🍼 from the very basics for beginners to 🍺 advanced concepts and applications for professionals all in one go. Especially in this day and age where AI is taking over the roles of coders, this course will be of great help in growing into an essential talent.
Who is Yalco? 😀
I am a YouTuber who runs the channel "Shallow Coding Dictionary" and an author of IT books. I create content that explains difficult programming concepts through metaphors, simple examples, and sometimes animations to make them easy for beginners to understand. During the day, I work as a full-stack developer.
We teach step-by-step starting from the very basics so that even beginners can learn easily.
⚠️ However, the pace of the lecture may feel fast, or the amount of content to learn may feel overwhelming. Please be sure to check the free sections first!
Those who want to dig deep into Java and study it properly
We will clearly define concepts that were once vague and hazy.
Stop haphazard coding! Become a skilled professional who won't be replaced by AI.
Job seekers who want to find employment as a developer (especially backend) in Korea
Technical questions in coding tests and interviews will no longer be intimidating.
You will acquire the Java theoretical and practical knowledge that companies look for.
Developers who use Java-based technologies like Spring, but lack a deep understanding of Java itself
Stop copy-pasting code! Now you can understand what this code does and why it's used this way before you use it.
You will be able to utilize the technology you handle more effectively.
Special points unique to Yalco's Java course ✨
YouTuber Yalco's Max-level explanatory power 💡
Yalco has been a source of strength for students and job seekers through videos that explain coding knowledge easily! Through witty analogies and simple examples, he provides a clear understanding of various concepts that once felt complex.
Too-Much-Explainer's Detailed Lecture 🎙️
We delve deeply not only into Java syntax and basic usage but also into how each feature operates, how the relevant classes and libraries are designed, and how they each impact internal performance.
Efficient and in-depth learning through debugging 🐞
Instead of simply printing values to the console, you will learn efficiently and deeply by making full use of IntelliJ IDEA's debugging features to intuitively verify values used in examples and examine the internal details of instances.
Convenient practice via Notion pages 🖥️
We provide a lecture page so you can check text content and example codes through your browser and copy-paste them. (🔗 Free Part Link)
All the knowledge you will learn in this lecture is condensed into examples prepared with great care over a long period. You can follow the lecture while viewing, copying, and pasting these examples from the webpage for hands-on practice.
Basic content released for free 😎
To ensure that students can study without any financial burden, half of the entire curriculum is available for free through the preview.
어떤 내용을 배우게 되나요? 📚
🏁 Section 0. Intro
Introduction to the Java language, reasons to learn Java
Concepts regarding JVM, JRE, JDK, and Java versions
👟 Section 1. Preparation for the Course
How to use the console, comments, and semicolons
Concepts and internal principles of variables and constants / Memory concepts
🌱 Section 2. Getting Started with Java
How to run Java and its principles
How to use comments
🧮 Section 3. Java Data Types and Operators
The concept of data types, how to use the debugger in IntelliJ IDEA
Primitive data types and the operators used with them
Concept of floating-point error
Principles and basic features of strings / The concept of null
Concepts and principles of primitive and reference types
Type Inference
🚥 Section 4. Control Statements and Methods
Conditional statements (if, else, switch) and practical usage methods
for loops (standard, object, array) / iteration via (do) while
Concepts and various forms of methods
📦 Section 5. Object-Oriented Programming
Concepts and various applications of classes
Static Elements / Accessor Concepts
Inheritance and Polymorphism
Abstract Class / Interface
Singleton Pattern
🎁 Section 6. Learning More About Classes
Block / Scope / Package Concepts
Inner Class / Anonymous Class / Main Method
Enums / Records
Useful Library Classes
🎲 Section 7. Classes and Data Types
Object Class
Wrapper Class
Generics
🍡 Section 8. Collection Framework
Concept of Collections
Variations and usage of List / Set / Map
Concepts and usage of Comparable / Comparator
Iterator
🦾 Section 9. Functional Programming
Functional Interface
Lambda Expressions / Method References
Concepts and usage of streams
🐞 Section 10. Preparing for Errors
Concepts of errors / exceptions, types of exceptions
try / catch / finally statements
Defining / Throwing / Rethrowing Exceptions
try with resources
NPE and Optional
🏭 Section 11. Multitasking
Threads / Thread Groups / Daemon Threads
Synchronization and various thread-safe methods
Thread Pool
Future / CompletableFuture
Parallel Stream
🏭 Section 12. Data I/O and Networking
Handling files / folders via NIO
I/O Stream / Reader & Writer
Serialization
URL Access / Socket Programming
🛠️ Section 13. Reflection and Annotations
Reflection / Class Loader
Concepts and usage of annotations
JavaDoc
📚 Section 14. Libraries
Sourcepath / Classpath
JAR
Build Tool (Gradle)
Utilizing External Libraries / Useful Libraries
Check the Frequently Asked Questions 💬
Q. What can I do if I learn Java?
Java has been one of the most beloved languages worldwide for a long time. Especially in Korea, where technologies utilizing Java such as Spring are widely used, it is an advantageous language for domestic employment. Furthermore, since Java shares the classic characteristics and designs found in other languages, mastering Java alone will allow you to learn other languages very easily.
Q. What are the features that differentiate this course from other Java courses?
This course proceeds with numerous examples packed with various knowledge about Java. You can practice conveniently by using the 🔗 lecture page, where you can examine and copy-paste all the examples.
We do not simply look at Java's syntax elements and features on the surface; instead, through debugging and examining original source code, we delve deeply into how each component is structured and functions internally, how they relate to other features or concepts, and what constitutes the most efficient way to utilize them. Since the density of the lectures is very high, you will acquire a vast amount of knowledge relative to the total duration (20 hours).
Q. I am already working with Java in practice; how much will this lecture help me?
Deeply understanding the language that serves as the foundation of the framework you use is essential for properly utilizing that technology. Only by learning Java correctly can you prevent various inefficiencies, errors, and performance degradation that occur in practice, and use your technology stack freely. Continuous in-depth learning is also essential to grow into a professional who cannot be replaced by AI.
Please check before taking the course Learner Notes 📢
Practice Environment
Operating System and Version (OS): You can learn on Windows, Mac, and Linux.
Tools Used: The practice will be conducted using the free version of IntelliJ IDEA. (The free version is sufficient)
I am the YouTuber behind the channel Yal-co's Coding Dictionary, as well as an author of IT books. Drawing on my experience as a full-stack developer, I create content that explains difficult programming concepts through metaphors, simple examples, and sometimes animations to make them easy for beginners to understand.
Whenever I develop, if there is something I don't know, I keep coming back and checking. The lectures are good, but the parts organized through Notion are a great help in development. It's like a comprehensive gift set. If you feel something is lacking while studying Java, you can fill it in through this lecture.
I studied Java once with a book, but I didn't know much about it, so I looked for a different way to study and listened to the lecture.
At first, I was not sure if it was long because it was not much different from the book, but the more I listened, the more I became convinced that I had done well in listening to the lecture. The lecturer explained it with analogies, so I understood it better than when I studied with the book, and I think he explained it in more detail than in the book. So now I feel like I know and understand Java a little bit. And the system where I can ask questions right away is also really good.
I don't usually leave reviews, but if there are people like me who are wondering whether to just study with the book again or listen to the lecture, I wrote this because I wanted to let them know that they won't regret listening to the lecture.
Thank you for taking the class! I was worried about the way I asked questions, but I am also grateful that you gave me this feedback so that I can be confident. If there is anything that is a little confusing or difficult to understand, please feel free to ask questions! I will do my best to help you learn more and more easily than in the book!
To conclude, 'There is no lecture like this at this price anywhere in the world...!'.
In fact, you can feel the taste of object-oriented programming JAVA just with the free part, but the paid part is really packed with easy-to-see examples and explanations! Of course, you have to review, but I think that thanks to this thoroughness, you can easily get the idea of 'Oh, this concept was like this' in one lecture.
Some people said that the lecture was too fast, so I was worried, but I looked at the code on the Notion page provided first or typed it myself and then listened to the lecture, so there was no problem with that part. In fact, I listened to some parts at 1.5x speed, so I think those who are taking the lecture don't have to worry.
Of course, the lecture content is not easy... There is a lot to memorize! Especially the paid part! However, I think it's because Java itself is a subject that you have to learn a lot, so you can approach it more easily through easy examples, and because the lectures are divided into 'things that are good to know now', 'things that are good to look up later when you need them, things to just look at', etc., I think it was a class that could greatly lower the entry barrier to Java through the lectures!
Of course, I haven't memorized all the parts I need yet... But I think I can learn it quickly through review. I dream of becoming a backend developer, so this was a lecture that I really needed. Thank you!
Thank you for giving me a great sense of accomplishment as I prepared so hard ㅠㅠ There were many parts that I was worried about, but I'm so glad that the lecture was helpful!! If you have any further questions or difficulties in practice, please feel free to ask and I will be happy to help you at any time. Thank you!!!
I haven't taken all of the classes yet because I'm looking for the parts I need, but I'm leaving a review first because the lectures are really good.
The lecture materials are organized and prepared in a way that's easy to find. When I'm in a hurry, I can just look at the code in Notion, and it's also good for debugging by copying and pasting. (Of course, when I have time, it's best to try it out myself.)
And the examples are fun and well-made. They contain the content that's essential for understanding the concepts, but they're also interesting and provide good stimulation.
This is Yalko's second lecture after JavaScript Reactive Programming. I felt that all of the lecture materials and lecture content were full of useful content without any unnecessary details. Thank you for preparing such a great lecture.
Where else can I take a course like this at this price, ... I'm still a little lacking in writing code on my own... but I'm confident that I can do it if I study hard!!
I'll study hard until I finish the course! Thank you ~!!!!!!!
Thank you so much... I've been preparing and producing for over half a year, but I've been worried and sometimes even dizzy if this method is right and if the explanations will be understood by the students. I'm so happy and it's rewarding that the lectures were helpful to non-majors!!
Please feel free to ask questions about any difficult or insufficient explanations during the remaining course! I'll do my best to help you until the end.
Thank you for taking the course!!!