Java OOP Fundamentals

This repository contains Java programs demonstrating fundamental Object-Oriented Programming (OOP) concepts such as encapsulation, inheritance, and basic class design. It includes four tasks (1.1 to 1.4), each illustrating a different OOP principle.

📁 Project Structure

java-oop-fundamentals/
│
├── .github/
│   └── workflows/
│       └── java-build.yml
│
├── screenshots/
│   ├── 1.1.png
│   ├── 1.2.a.png
│   ├── 1.2.b.png
│   ├── 1.3.png
│   └── 1.4.png
│
├── src/
│   ├── Account.java
│   ├── Person.java
│   ├── Person_2.java
│   ├── Product.java
│   └── XYZ.java
│
├── LICENSE
└── README.md

📝 Task Overviews

Task 1.1 — Person Class

• Implements a Person class with name and age.
• Default age is 18.
• Includes constructor + method to display info.

▶️ Screenshot:

---

Task 1.2 — Product Class

• Represents products with pid, price, and quantity.
• ProductMain:
  • Accepts 5 products.
  • Finds highest price product.
  • Calculates total expenditure.

▶️ Screenshots:

---

Task 1.3 — Account Class

• Implements deposit, withdraw, and display methods.
• Includes default + parameterized constructors.

▶️ Screenshot:

---

Task 1.4 — Inheritance (Person → Employee)

• Employee extends Person.
• Adds employeeID and salary.
• Uses super() for parent initialization.

▶️ Screenshot:

---

▶️ Running the Programs

1. Clone the Repository

git clone https://github.com/TheComputationalCore/java-oop-fundamentals.git
cd java-oop-fundamentals/src

2. Compile

javac *.java

3. Run (examples)

java Person
java Product
java Account
java XYZ

---

📦 Requirements

• Java JDK 8 or higher
• Any terminal or Java IDE

---

📄 License

This project is licensed under the MIT License.