Java Main Method
Java Runtime
Java Data Type / Wrapper
Java Class / Object
Java Inheritance
Java Overload / Overload
Java Abstract / Concrete
Java Abstract / Interface
Java Class / Abstract / Interface
Java Generics
Java Collection Hierarchy
Java Exception Hierarchy
Java Wrapper Class
Java Object Oriented Programming
Java Polymorphism
Process and Thread
Java Thread
Java Thread State
Concurrent and Parallel
Synchronous and Asynchronous
Blocking and Non-Blocking
Sync / Async / Block / Non-Block
Java Promise Future
Java Completable Future
Java Stream Hierarchy
Java Stream Operation
Sequential / Parallel Stream
Inversion of Control
Dependency Injection
Service Locator / Dependency Injection
Enterprise Java Beans
Session Bean
Entity Bean
Session Bean / Entity Bean
Message-Driven Bean
Singleton
Factory Pattern
Proxy Pattern
Template Method Pattern
Bean Scope
Bean Life Cycle
Aspect Oriented Programming
Beans and AOP
AOP Framework
AOP Structure and Proxy
AOP Process and Proxy
Spring Beans Annotation
Spring Core Annotation
Spring Web / Stereotype Annotation
ORM
Spring Boot Layered Architecture
Spring Boot MVC
DTO / DAO / Beans
JPA(Java Persistence API)
Intreospection / Reflection
Java Reflection
