Unit 4: Package Organization

This project demonstrates professional Java package organization and import management.

Project Structure

unit-4-work/
├── src/main/java/
│   └── com/
│       └── example/
│           ├── model/
│           │   ├── Product.java
│           │   └── DigitalProduct.java
│           └── main/
│               └── Store.java
├── README.md
└── .gitignore

Learning Objectives

• Understand Java package organization
• Learn proper package naming conventions
• Master import statements and dependencies
• Organize code for professional development
• Prevent naming conflicts through packages

How to Run

1. Compile all Java files:

   javac src/main/java/com/example/model/*.java src/main/java/com/example/main/*.java

2. Run the Store application:

   java -cp src/main/java com.example.main.Store

Package Structure

com.example.model

Contains all data model classes:

• Product: Base product class with encapsulation
• DigitalProduct: Extended product class with inheritance

com.example.main

Contains application entry point:

• Store: Main class demonstrating package usage and imports

Key Concepts

• Package Declaration: package com.example.model;
• Import Statements: import com.example.model.Product;
• Fully Qualified Names: com.example.model.Product
• Package Organization: Logical grouping of related classes
• Namespace Protection: Preventing naming conflicts

Professional Benefits

1. Clear Organization: Related classes grouped together
2. Namespace Protection: No naming conflicts between packages
3. Import Management: Clear dependencies between packages
4. Scalability: Easy to add new packages and classes
5. Industry Standards: Professional Java development practices