oop

Object-Oriented Programming Documentation

Documentation for OOP concepts in Java.

Topics

• Classes and Objects - Creating and using classes
• Encapsulation - Data hiding and access control
• Inheritance - Code reuse through inheritance
• Polymorphism - Method overloading and overriding
• Abstraction - Abstract classes and interfaces
• Design Principles - SOLID and other principles

Core Concepts

The Four Pillars of OOP

1. Encapsulation: Bundling data and methods that operate on that data
2. Inheritance: Creating new classes based on existing ones
3. Polymorphism: Objects taking multiple forms
4. Abstraction: Hiding complex implementation details

Quick Reference

// Class definition
public class Person {
    private String name;
    private int age;
    
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    public String getName() {
        return name;
    }
}

// Inheritance
public class Student extends Person {
    private String studentId;
    
    public Student(String name, int age, String studentId) {
        super(name, age);
        this.studentId = studentId;
    }
}

// Interface
public interface Drawable {
    void draw();
}

Learning Path

1. Understand classes and objects
2. Learn about encapsulation and access modifiers
3. Study inheritance relationships
4. Master polymorphism concepts
5. Implement abstraction using interfaces
6. Apply design principles

Practice Exercises

Refer to the java-oop module for practical implementations and examples.