- OOP through Class
- Abstraction
- Define a Class
- Create object
- Class Attributes
- Class Methods
- Constructor
- Modifiers & Encapsulation
- Inheritance
- Interface, Abstract Class, and Class
- Enums
- inner classes
- LinkedList
- HashMap
- HashSet
- Iterator
- RegEx
- Multi-Thread
- Collections
- Generics
- Send email
- Applet Basics
- Spring-Boot basic