Class and Object

Class
class objects ka ya kisi object ke idea ka blue print hoti hain .
Ya class collection hoti hain group of objects kaa jinmein kuch similar properties hoti hain.
Class ko ham encapsulation of attributes and methodds bhi kehte hain kyuki
ek class mein bohot saare objects ya methods ho sakte hain.

Syntax of a Class:

class
{
attributes/variables;
Constructors();
methods();
}

Object:
Object real world entities hoti hain. matlab aise cheez jinki state , behaviour and identity define ki jaa sake.

State: state object ke data ko show karti hai.
Behavoiur: object ke show ko define karta hai.
Identity: ye internal use hota hai . Object ko identify karne ke liye.

Ex.....
fan . fan ka color and all iski state hai. on ya off hona iska behaviour hai. and identity internal use ke liye
hoti hai. fan ko recognize karne karne ke liye.


Instance Of a class....
object jo hai vo hi class ka instance hota hai jo hi ek entity hota hai..jiske apne methods and attributes
hote hain.


Creating an Instance

ClassName refVariable;
refVariable = new Constructor();
or
ClassName refVariable = new Constructor();