Kim Young-han's Java Tutorial - Your First Step into Java with Code

Learn Java generics and collection frameworks in depth with a focus on practical applications. Also learn the basics of data structures.

Easily learn the core concepts of Java object-oriented programming needed in practice through example code.

Beginners to Spring can understand the core principles of Spring and solidify their foundation in Spring by creating examples.

For those who are new to JPA or who use JPA in practice but lack basic theory, By learning the basic theory of JPA solidly, even beginners can confidently use JPA in practice.

Learn the essential modern Java technologies of Lambda, Stream, and functional programming with Java, from the basics to the practical level, in depth.

This course provides an in-depth study of multithreading and concurrency, from basic principles to practical applications.

You can understand and master all the web technologies required for web application development from the basics. In Part 2 of MVC, you can learn all the utilization technologies required for practical web development on top of the core principles and structure of Part 1 of MVC.

This book provides an in-depth study of various intermediate-level Java features necessary for practical work, using example code.

Learn the core HTTP features essential for practical use and how to design proper HTTP APIs.

You can understand and master all the web technologies required to develop web applications from the basics. You can understand the core principles and structure of Spring MVC and grow into a more in-depth backend developer.

Develop APIs using Spring Boot and JPA. And learn how to optimize JPA's extreme performance.

Solve everything from the basics of querydsl to practical use all at once!

Learn I/O, networking, reflection, and annotations in depth, from the basics to the practical level. Build a web application server (WAS) directly in Java.

With a practical example, we will design and develop a web application using Spring Boot and JPA. Through this process, you will understand how to use Spring Boot and JPA in practice.

You can understand and perfect the basics of DB data access technology required for backend development. You can understand the principles and structure of Spring DB access technology and grow into a more in-depth backend developer.

Spring Data JPA goes beyond the limitations of the past and allows you to complete development with just an interface, without implementing classes in the repository, as if by magic. It also provides all the basic CRUD functions that have been developed repeatedly. We will share practical know-how on Spring Data JPA.

You can utilize and complete the DB data access technology required for backend development. You can understand the principles and structure of Spring DB access technology and grow into a more in-depth backend developer.

This course will cover everything you need to know about Spring Boot for practical use.

You will learn the core principles and advanced technologies of Spring in depth and be able to use Spring confidently.

Beginners to Spring can quickly learn the entire Spring web application development process by creating examples.

This book provides an in-depth study of various intermediate-level Java features necessary for practical work, using example code.

Learn Java programming language by solving 100 problems. The entire course consists of 5 parts. In Part 1 of this course, you will solve problems on the topics of environment settings, variables, data types, and operators.

In this course, you will learn Kotlin syntax, how to safely convert Java projects to Kotlin, and how to code in a Kotlin-like manner. Learn Kotlin based on practical code and use it yourself to enjoy its advantages.

This course is for those preparing for coding tests in Java. It covers the top 10 topics that are most frequently tested in coding tests. It is structured step by step from basic to intermediate problems linked to the topic, so if you follow it step by step, you will get good results.

Learn various design principles for OO code, centered on working code.

Through training in thinking, expressing, and coding, you can easily understand and approach Java programming. You can understand the relationship between programming elements and gain confidence in future Java API utilization and projects through precise concept organization of object-oriented programming.

This is an introductory Java course. It's easy.

JAVA is a programming language, just like the C language. JAVA can be used for web development and application development, and here we will learn JAVA before doing web development.

Through the 25 patterns of OODP, you will learn various methods of designing software in an object-oriented manner.

Through this course, you will gain a deep understanding of clean code principles and be able to write clean code based on object-oriented thinking. This course is for anyone curious about clean code and object-orientation, and everyone who truly wants to write good code.

What types of questions are on coding tests these days? Solve the “real-world” problems that reflect the latest corporate coding test trends. We will provide you with proven problems and solutions that will effectively develop your algorithm and problem-solving skills. (with Java)

Handling media (video, audio) on the web is now easier than ever! Learn the MediaStream API and WebRTC by following along step by step.

You can systematically learn stock trading automation using Python and the Interactive Brokers API, which holds the top spot in global market share.

This is a lecture for people who are starting development for the first time. It's about programming thinking, which should come before development languages or UI frameworks.

This is a Unity C# scripting course for absolute beginners who are learning programming for the first time. It was created by carefully selecting the core grammar necessary for utilizing Unity scripts.

This is a problem-solving lecture that improves coding skills by covering various problems from the basics according to difficulty level on Baekjoon Online Judge (BOJ). This lecture is a Bronze 3 difficulty lecture.

Learn how to save, modify, delete, and query data in a database. Anyone, regardless of major, can easily follow along in just 30 minutes.

Using Python, you will learn about the features of each service and how to implement bots through various examples, such as Telegram bot, Slack bot, KakaoTalk chatbot, and Discord bot.

Experience the power of Type Safe SQL with jOOQ!

If you can master DB and programming, you should be more than halfway prepared for the information processing engineer exam. Let's take a look at the DB and programming parts, which are worth 45 to 55 points in the practical exam, and pass the written exam steadily.