Abstraction in Java

“Abstraction is a process of hiding the implementation details and showing only functionality to the user.”

Another way, it shows only important things to the user and hides the internal details for example sending sms, you just type the text and send the message. You don't know the internal processing about the message delivery.

Abstraction lets you focus on what the object does instead of how it does it.

Abstraction is "To represent the essential feature without representing the back ground details."

Abstraction lets you focus on what the object does instead of how it does it.

Abstraction provides you a generalized view of your classes or object by providing relevant information.

Abstraction is the process of hiding the working style of an object, and showing the information of an object in understandable manner.

Real world Example of Abstraction: - 

Suppose you have an object Mobile Phone.

Suppose you have 3 mobile phones as following:-

Nokia 1400 (Features:- Calling, SMS)

Nokia 2700 (Features:- Calling, SMS, FM Radio, MP3, Camera)

Black Berry (Features:-Calling, SMS, FM Radio, MP3, Camera, Video Recording, Reading E-mails)

Abstract information (Necessary and Common Information) for the object "Mobile Phone" is make a call to any number and can send SMS."

so that, for mobile phone object you will have abstract class like following:-

    abstract class MobilePhone

    {

        public void Calling();

        public void SendSMS();

    }

    public class Nokia1400 : MobilePhone

    {

    }

    public class Nokia2700 : MobilePhone

    {

        public void FMRadio();

        public void MP3();

        public void Camera();

    }

    public class BlackBerry : MobilePhone

    {

        public void FMRadio();

        public void MP3();

        public void Camera();

        public void Recording();

        public void ReadAndSendEmails();

    }

Abstraction in java is implemented using  by two way :-

               Abstract class and    interfaces.

-------------------->coming with Abstract class and Interface<-------------

Thanks

Keep Learning.. :)