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Java - Object-Oriented Programming (OOPS) Concept - Object & Class Tutorial

 

Object

Anything that has a state and behavior is known as an object. For example, a pencil, chair, mouse, keyboard, mobile, etc.

An object is created from the class.

Class

A class is a collection of objects.

public class ObjectExample {
public void m1(){
System.out.println("Hello Fresherbell");
}
public static void main(String[] args) {
ObjectExample message = new ObjectExample();
message.m1();
}
}

Run Program

We can also use multiple objects

public class MultipleObjectExample {
public void m1(){
System.out.println("Hello Fresherbell");
}
public static void main(String[] args) {
MultipleObjectExample message1 = new MultipleObjectExample();
MultipleObjectExample message2 = new MultipleObjectExample();
message2.m1();
message2.m1();
}
}

Run Program

 

Java

Java

  • Introduction
  • Installation and running a first java program
    • JDK Installation
    • Environment Variable Path Setup
    • Running a first java program
  • 1st Java Program Explanation
    • Program Syntax
  • JDK,JRE,JVM
    • JRE
    • JDK
    • JVM
  • Thing to know before proceed
    • Variable
    • Datatype
    • Operator
    • Keyword
    • Access Modifier
  • Decision Control and looping statement
    • If-else
    • Switch
    • For
    • While
    • do-while
    • break
    • continue
  • Object-Oriented Programming (OOPS) Concept
    • About OOPs
    • Object & Class
    • Inheritance
    • Polymorphism (Runtime & Compile Time)
    • Abstraction (Using abstract and interface)
    • Encapsulation

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