Chapter 4: Object-Oriented Programming (OOP) in Java
Object-oriented programming in Java is centered around the use of classes and objects, which serve as blueprints for creating real-world entities. Core principles like encapsulation, abstraction, inheritance, and polymorphism allow for efficient structure, modularity, and code reuse. Concepts such as constructors and access modifiers play vital roles in initializing and securing data.
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Sections
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What we have learnt
- Classes and objects are core to Java.
- Use constructors to initialize objects.
- Encapsulation protects data via access modifiers.
- Abstraction shows only essential details.
- Inheritance supports code reuse.
- Polymorphism enables dynamic and flexible code.
- Use this for the current object, static for shared properties.
Key Concepts
- -- Encapsulation
- Wrapping data and methods together while restricting access to some components.
- -- Abstraction
- Hiding complex details and exposing only the necessary parts of an object.
- -- Inheritance
- A mechanism where a new class inherits properties and behavior from an existing class.
- -- Polymorphism
- The ability of a method to do different things based on the object it is acting upon.
- -- Constructor
- A special method invoked when an object is created, used to initialize the object.
- -- Access Modifiers
- Keywords used to set the accessibility of classes, methods, and variables.
Additional Learning Materials
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