Java Foundations and Java SE 21 Programming Complete (Lessons 1 – 6) Ed 1

Course Introduction

• Course Goals
• Audience
• Course Structure

Introduction to Java

• Objectives
• What Is Java?
• How Java Works
• Object-Oriented Principles
• Classes and Objects
• Classes
• Objects
• Inheritance
• Java APIs
• Java Keywords, Reserved Words, and Special Identifiers
• Java Naming Conventions
• Java Basic Syntax Rules
• Defining a Java Class
• Accessing Classes Across Packages
• Implementing Encapsulation with Access Modifiers
• Creating a Main Application Class
• Compiling a Java Program
• Executing a Java Program
• Comments and Documentation
• Code Snippets in Javadoc
• External Snippets
• Summary
• Practices for Lesson 1: Overview

Primitive Types, Operators, and Flow Control Statements

• Objectives
• Java Primitives
• Declaring and Initializing Primitive Variables
• Primitive Declarations and Initializations: Restrictions
• Java Operators
• Assignment and Arithmetic Operators
• Arithmetic Operations and Type Casting
• More Mathematical Operations
• Binary Number Representation
• Bitwise Logical Operators
• Equality, Relational, and Conditional Operators
• Short-Circuit Evaluation
• Flow Control Using if/else Construct
• Ternary Operator
• Flow Control Using switch Construct
• Switch -> No Fall-Through Syntax
• Switch Expressions yield a Value
• Switch Statements and Expressions Summary
• Using JShell (REPL Tool)
• JShell Commands
• Code Snippets
• Summary
• Practices for Lesson 2: Overview

Text, Date, Time, and Numeric Objects

• Objectives
• String Initialization
• String Operations
• String Indexing
• Mutable Text Objects
• Text Blocks
• Spaces, Lines, and Quotes
• Wrapper Classes for Primitives
• Representing Numbers Using BigDecimal Class
• Method Chaining
• Local Date and Time API
• More Local Date and Time Operations
• Instants, Durations, and Periods
• Zoned Date and Time
• Representing Languages and Countries
• Formatting and Parsing Numeric Values
• Formatting and Parsing Date and Time Values
• Localizable Resources
• Formatting Message Patterns
• Formatting and Localization: Summary
• Summary
• Practices for Lesson 3: Overview

Classes and Objects

• Objectives
• UML: Introduction
• Modeling Classes
• Modeling Interactions and Activities
• Designing Classes
• Creating Objects
• Defining Instance Variables
• Defining Instance Methods
• Object Creation and Access: Example
• Local Variables and Recursive Object Reference
• Local Variable Type Inference
• Defining Constants
• Static Context
• Accessing Static Context
• Combining Static and Final
• Other Static Context Use Cases
• IntelliJ IDE: Introduction
• Summary
• Practices for Lesson 4: Overview

Improved Class Design

• Objectives
• Overload Methods
• Variable Number of Arguments
• Defining Constructors
• Reusing Constructors
• Access Modifiers: Summary
• Defining Encapsulation
• Defining Immutability
• Constants and Immutability
• Enumerations
• Complex Enumerations
• Java Memory Allocation
• Parameter Passing
• Java Memory Cleanup
• Summary
• Practices for Lesson 5: Overview

Implement Inheritance and Use Records

• Objectives
• Extending Classes
• Object Class
• Reusing Parent Class Code Through Inheritance
• Instantiating Classes and Accessing Objects
• Rules of Reference Type Casting
• Verifying Object Type Before Casting the Reference
• Pattern Matching for instanceof
• Reference Code Within the Current or Parent Object
• Defining Subclass Constructors
• Class and Object Initialization: Summary
• Overriding Methods and Using Polymorphism
• Reusing Parent Class Logic in Overwritten Method
• Defining Abstract Classes and Methods
• Defining Final Classes and Methods
• Sealed Classes and Interfaces
• Overriding Object Class Operations: toString
• Overriding Object Class Operations: equals
• Override Object Class Operations: hashCode
• Comparing String Objects
• Java Records
• Custom Record Constructors
• Record Patterns
• Pattern Matching for switch
• Factory Methods
• Summary
• Practices for Lesson 6: Overview