Class and Objects

What is Class?
A class is a group of objects that has common properties. It is a template or blueprint from which objects are created.

A class in java can contain:

1. data member
2. method
3. constructor
4. block
5. interface

When we create a class in java, the first step is to define keyword class and then name of the class.
Next is class body which starts with curly braces {} which enclose property and methods of the class.

Template of class:
class <class_name>{  
    data member;  
    method;  
}  

Example:

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public class Dog { String breed; int ageC; String color; void barking() { // .. } void hungry() { // .. } void sleeping() { // .. } }

Objects
In real-world, we see many objects around us like cars, dogs, cats etc. All these objects have a state and a behavior.

Example: A dog has states-color, name, breed as well as behaviors - wagging, barking, eating. 

An object is an instance of a class.

If you compare the software object with a real-world object, they have very similar characteristics.

A class provides the blueprints for objects. So basically an object is created from a class. In Java the new keyword is used to create new objects.

Syntax to create new object:
Dog D1 = new Dog();

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public class Dog{ public static void main(String[]args){ Dog D1 = new Dog(); } }

Example:

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