OOP in Java
Complete Object-Oriented Programming Guide

OOP in Java Articles

• 1
  OOP Concepts in Java

  Core OOP
• 2
  Class in Java

  Class
• 3
  Object in Java

  Object
• 4
  Class vs Object in Java

  Comparison
• 5
  Constructors in Java

  Constructor
• 6
  Types of Constructors

  Constructor
• 7
  Default Constructor

  Constructor
• 8
  Parameterized Constructor

  Constructor
• 9
  Constructor Overloading

  Constructor
• 10
  Method in Java

  Method
• 11
  Method Overloading

  Method
• 12
  Method Overriding

  Method
• 13
  Inheritance in Java

  Inheritance
• 14
  Types of Inheritance

  Inheritance
• 15
  Single Inheritance

  Inheritance
• 16
  Multilevel Inheritance

  Inheritance
• 17
  Hierarchical Inheritance

  Inheritance
• 18
  Multiple Inheritance in Java

  Inheritance
• 19
  Diamond Problem in Java

  Inheritance
• 20
  Polymorphism in Java

  Polymorphism
• 21
  Compile-Time Polymorphism

  Polymorphism
• 22
  Runtime Polymorphism

  Polymorphism
• 23
  Abstraction in Java

  Abstraction
• 24
  Abstract Class in Java

  Abstraction
• 25
  Interface in Java

  Interface
• 26
  Multiple Inheritance using Interface

  Interface
• 27
  Encapsulation in Java

  Encapsulation
• 28
  Access Modifiers in OOP

  Modifiers
• 29
  this Keyword in Java

  Keyword
• 30
  super Keyword in Java

  Keyword
• 31
  static Keyword in Java

  Keyword
• 32
  final Keyword in Java

  Keyword
• 33
  Object Class in Java

  Core
• 34
  Inner Class in Java

  Class
• 35
  Anonymous Class in Java

  Class
• 36
  Nested Class in Java

  Class
• 37
  Aggregation in Java

  Relationship
• 38
  Composition in Java

  Relationship
• 39
  Association in Java

  Relationship
• 40
  Covariant Return Type

  Advanced