This covers the major updates from Java 9 to Java 21 in detail. It will be continuously updated as new versions are released up to Java 31.

Coroutine, the essential library for asynchronous programming! Learn the concept, usage, and internal principles of coroutines all at once!

You can understand all the linguistic characteristics of Kotlin. After taking this course, you will be able to program freely using advanced Kotlin techniques such as generics, delegation and laziness, DSL, and reflection.

Develop and deploy servers using Java, Spring Boot, JPA, MySQL, and AWS. While developing web applications, you will learn all the background knowledge, theories, and various technologies required for server development, as well as the meaning of various options, the history of Spring Boot, and the changes in the latest version.

We will refactor a web application built with Java + Spring Boot to Kotlin + Spring Boot and implement additional requirements. In the process, we will use Junit5, SQL, JPA, and Querydsl, and cover the pros and cons of various methods from the design and implementation perspectives.

Through this lecture, you can learn about the characteristics and background of the Kotlin language, grammar and operation principles, usage examples, and things to be careful of when using Java and Kotlin together.