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Answer

Difference between Object and Class

Key difference: Class and Object are two most important concepts of an Object oriented programming language. The main difference between the two is that class is a blueprint which is used to create different objects of the same type.

Object Oriented Programming (OOP) is a very popular style of programming because of its ability to handle complex applications with more codes. Class and object are two terms that are commonly used in OOP languages. In its most basic form, objects are the instantiation of classes. This article differentiates between the two terms.

An object is defined as any entity that can be utilized by using commands in a programming language. An object can be a variable, value, data structure or a function. In OOP, an object is referred to as an instance of a class.

An object is an extension of abstract data type, with addition to polymorphism and inheritance. An object has state (data) and behavior (code). In programming, the key is that each object itself is responsible for carrying out tasks.

An object contains properties and methods which are needed to make a certain type of data useful. An object’s properties are what it knows and its methods are what it can do. The methods provide functionality to applications and ensure that an object’s data is being used properly. Methods also allow the actual execution of tasks to be hidden and to be standardized for particular operations for different types of objects. Methods are used to access the objects of a class. All the interaction is done through the object’s methods. This is known as data encapsulation. The objects are also used for data or code hiding.

A class is a concept used in object oriented programming languages such as C++, PHP, and JAVA. It provides values for state (member variables) and implementations of behavior (member functions, methods) in programs.

A class is said to be a blueprint of an object. It is an extensible guide used for creating objects; it is a subroutine that creates an object. A class does not represent the object; it represents all the information and methods an object should have. One class can be used to instantiate multiple objects. It is considered to be an extended TYPE declaration. Below is a basic example:

class Sample

{

   public static void main(String[] args)

   {

      String sampleText = "Hello world!";

      System.out.println(sampleText);

   }

}

Answer

Object is a Living and Non - Living things. An instance of a class is also known as an Object. Object is an Runtime entities.

Its Syntax is:    Object_name;

Example :  Ship;

Class is a collection of objects of similar type which acts as a container to collect all its objects. This container provides the security to the Object Oriented Programming.

Its Syntax is : Class_Name Object_name1;

Example : Class Ship

Answer

Defnition:

Class is mechanism of binding data members and associated methods in a single unit.

Instance of class or variable of class is called Object

Existence:

Class is logical whereas object is physical existence

Memory Allocation:

When class is created memory space is not allocated but when object is created memory space is allocated

Declaration/Definition:

Class is defined only once, but an object can be declared multiple times

Answer

Class is the teplate which having its own intance variables and behaviors.

Object is the instance of the class.

Let say Student is the class but if we create instance Pankaj with name instance of Student then Pankaj is object. Objects are real time entity.