OOP_Java_Part2.pptxOOP_Java_Part1OOP_Java_Part1

OOP_Java_Part2.pptxOOP_Java_Part1OOP_Java_Part1

• 1.
  Title Slide • MasteringOOP in Java – Part 2 • Presented by: [Your Name] • Institution: [Your Institution] • Date
• 2.
  Inheritance • Reuse classfeatures using extends. • Example: • class Dog extends Animal { ... }
• 3.
  Method Overriding • Redefinesuperclass method in subclass. • Use @Override annotation.
• 4.
  Polymorphism • Compile-time: MethodOverloading. • Runtime: Method Overriding. • Example: • int add(int a, int b); double add(double a, double b);
• 5.
  Abstraction • Abstract class:Partially implemented. • Interface: Fully abstract. • Example: • abstract class Shape { abstract void draw(); }
• 6.
  Interface vs AbstractClass • Abstract Class: Can have state. • Interface: Only constants and abstract methods. • Interfaces allow multiple inheritance.
• 7.
  Case Study: ShapeClass • abstract class Shape { abstract void area(); } • Rectangle, Circle extend Shape and implement area().
• 8.
  Java Keywords inOOP • this: Refers to current object. • super: Refers to parent class. • final: Prevents override. • static: Shared across instances.
• 9.
  Best Practices inOOP • Use private fields and public methods. • Prefer composition over inheritance. • Avoid repetition (DRY principle).
• 10.
  Summary and Activity •Create abstract class Employee. • Subclasses: Manager, Developer. • Override displayDetails().