Java-OOP-Assessment-2

✅ Overview

This repository contains Java programs demonstrating important Object-Oriented Programming (OOP) concepts:

• super Keyword using Inheritance
• Access Modifiers in Java (public, private, protected, default)
• Encapsulation using Student class
• Abstract Class with Abstract Methods
• Abstract Class without Abstract Methods

Each program is created to help understand core Java OOP principles with simple examples.

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1. Program: Access Modifiers in Java

This program explains all four access modifiers:

Modifier	Accessible Within Class	Within Package	Subclass	Outside Package
public	✔	✔	✔	✔
private	✔	✖	✖	✖
protected	✔	✔	✔	✖ (only via inheritance)
default	✔	✔	✖	✖

Concepts Covered:

• public
• private
• protected
• default
• Package creation
• Access through inheritance and objects

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2. Program: Encapsulation using Student Class

This program demonstrates Encapsulation, where:

• The variables name, age, and roll_no are private
• Public getter and setter methods are used to access and modify them

Concepts Covered:

• Private data members
• Getters & Setters
• Data hiding
• Secure access to variables

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3. Program: super Keyword using Inheritance

This program demonstrates how the super keyword is used to:

• Call parent class constructor
• Call parent class method
• Access parent class variables

Concepts Covered:

• Inheritance
• super()
• Method overriding

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4. Program: Abstract Class with Abstract Methods

This program shows:

• How to create an abstract class
• How to define abstract methods
• How a subclass implements the abstract methods

Concepts Covered:

• Abstract class
• Abstract method
• Method implementation in child class

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5. Program: Abstract Class without Abstract Methods

This program demonstrates that:

• An abstract class can exist without any abstract methods
• It cannot be instantiated
• It can contain normal methods

Concepts Covered:

• Abstract class
• Concrete methods
• Inheritance

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📂 Folder Structure

Java-OOP-Assessment-2/
├── JavaAssessment-2/
│    └── src/
│         ├── Package1/
│         │     ├── Supper.java
│         │     └── Sub.java
│         ├── Package2/
│         │     ├── InnerSub.java
│         │     └── AccessModifiers.java
│         ├── Encapsulation/
│         │     └── Student.java
│         ├── AbstractWithMethods/
│         │     └── (files for abstract class with abstract methods)
│         └── AbstractWithoutMethods/
│               └── (files for abstract class without abstract methods)
└── README.md

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▶️ How to Run the Programs

1. Clone the repository:

git clone https://github.com/Shilpask123/Java-OOP-Assessment-2.git

2. Open the project in IntelliJ IDEA, Eclipse, or any Java IDE.

3. Navigate to the required file:

Java-OOP-Assessment-2/JavaAssessment-2/src/

4. Run the program

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🎯 Purpose of This Task

This task helps build strong understanding of:

• Inheritance
• Access control
• Encapsulation
• Abstraction
• super keyword
• Java class structure