Java Basics

• Some examples of java
• Objects, Classes, Interfaces, Packages, and Inheritance In Java
• Types of variable definations
• The Var Keyword
• Conditions and Branching in Java
• Class declaration order in java
• Method overloading in Java
• Java OOP example
• Varargs in Java
• Creating & Initializing Objects in Java with new keyword
• Return Types & Covariant Return Types in Java
• This keyword
• Access rules for inheritance with implementation and extend
• Polymorphism in java
• Object class methods
• Abstract Class
• String vs StringBuilder vs StringBuffer
• Nested Classes
• Record in java 16+

Access Modifiers

• Access Modifiers in Java
• Access Modifiers, Static & Instance Rules

Arrays

• Array Basics
• All Methods of java.util.Arrays Class

Wrapper Classes

• All the methods of Number based wrapper classes
• Character Wrapper Class
• String Wrapper Class
• StringBuilder Methods
• Autoboxing and Unboxing

Inheritance

• Basics of Inheritance
• Method Overriding And Hiding

Interface

• Basics of Interface
• Using an Interface as a Type

Generics

• Basics of Generics
• Type Inference in Generics
• Wildcards in Generics
• Restrictions on Generics

Lambda Expression

• Basics of Lambda Expression
• Functional Interface
• Method Reference
• Combining, Chaining, and Composing Lambdas
• Comparators

Misc.

• Enums