Understanding OOP Concepts

Class : the "blueprints" for an object and the actual code that defines the properties and methods

Object : running instances of a class that contain all the internal data and state information needed for your application to  function.

inheritance : the ability to define a class of one kind as being sub-type of a different kind of class (just like:

 child class->You
 parent class->Your father.

you can have your father's all properties  e.g  house,money ,but you also have your own properties e.g your friend,your PS3 .

In inheritance, you will have your father's house,your father's money,your friend and your PS3 ,But your father can't have your friend and your PS3
)


polymorphism : allow a class to be defined as being a member of more than one category of classes(just like :

a car is "a thing with an engine " and "a thing with wheels"

)

Interfaces : defines a contract specifying that an object is capable of implementing a method without actually defining how it is to be done.

encapsulation : the ability of an object to protect access to its internal data.

Billy: just have a look,no need  to remember it right now.Because  we will see how it works soon.