Java OOP

Constructor in Java

Constructor is a special method which is used to initialize the state of an object. Constructor is special method because it has following properties: – Automatically called – Constructor name is same as class name – No return type Programmer can’t call constructor explicitly. It is called automatically at the time of creation of object. …

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this Keyword in Java

this holds the reference of current object. Observe below example: class demo {                 int  x=10;                 void show(int x,demo d1)                 {                                 System.out.println(this.x);                                 System.out.println(d1.x);                                 System.out.println(x);                 }                 public static void main(String…s)                 {                                 demo d1=new demo();                       ,d1);                 } } Output: 10 10 20 In Java by default …

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Introduction to Object Oriented Programming Concepts in Java

Object Oriented Programming is used to represent the real world data. The main focus is on data. Simula is considered to be the first object oriented programming language. Object Oriented Programming Concepts There are 6 object oriented programming concepts in Java which are given below. Class Object Encapsulation Polymorphism Inheritance Abstraction Class Class is a …

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