CS1010X Lecture 15a - OOP, Java Encapsulation

0:00 Introduction & OOP Overview
1:11 The Three Pillars of OOP
2:24 How Encapsulation Works
2:59 OOP Advantages & Disadvantages
3:33 Java's Method Types
4:06 Encapsulation & Managing Complexity
5:14 Classes, Attributes & Visibility Modifiers
6:47 Bank Account Class Example
7:55 Constructors
9:01 Class vs Object & the Dot Operator
9:36 Testing the Bank Account Class
10:49 Object References & the Null Pointer
12:02 The 'this' Keyword
13:22 Code Resources & Wrap-up

CS1010X Lecture 15a — Object Oriented Programming with Java: Encapsulation

This lecture introduces Object Oriented Programming in Java with a focus on encapsulation. Using a BankAccount class as a running example, we explore how grouping private data with public methods protects data integrity and hides implementation details from outside code.

Topics covered:
- The three pillars of OOP: encapsulation, inheritance and polymorphism
- How Java enforces OOP through its class system
- Visibility modifiers: public, private, protected and default
- Building a BankAccount class with private attributes and public methods
- Constructors and object initialisation
- Object references, null pointers and aliasing
- The 'this' keyword and how Java distinguishes between objects

This is part of the CS1010X course. The BankAccount class introduced here mirrors the complex number class covered in Python during Lecture 10, now reimplemented in Java.

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