General

Abstract class in Java

General May 6, 2019
Java Abstract Class

Abstract class in Java

  • Abstraction is a process of hiding the implementation details and showing only functionality to the user.
  • Abstraction lets you focus on what the object does instead of how it does it
  • An abstract class may or may not have an abstract method.
  • There is no object creation for Abstract class. It should only be implemented and used by the subclass.
  • A subclass which inherits the abstract class either has to implement all the abstract methods present in the abstract class or declare itself as abstract.
  • It is like interface but it can have other method definitions apart from abstract method.
  • Abstract method is a method which has no implementation only declaration.

abstract void method();

Example:

package Mypkg;
public class myabs {
      /**
       * @param args
       */
      public static void main(String[] args) {
            // TODO Auto-generated method stub
        System.out.println("Entered myabs-Main() ");
        System.out.println("***************************************");
            useabs ob=new useabs();
            ob.getDisplay();
            ob.getD();
        System.out.println("***************************************");
        System.out.println("Exited  myabs-Main() ");
      }
}
abstract class myabsEx
{
      abstract void getDisplay(); // Abstract method
      void getD() // other method
      {
            System.out.println("This is normal method inside Abstract class");
      }
}
class useabs extends myabsEx
{      void getDisplay()
      {
            System.out.println("This is re Definition given of  Abstarct method class");
      }
}

Output :

Entered myabs-Main()

***************************************

This is re Definition given of  Abstarct method class

This is normal method inside Abstract class

***************************************

Exited  myabs-Main()

Click Here-> Get 100% Practical Java Training

Besant Technologies – Chennai & Bangalore Branch Locations

Besant Technologies - Velachery Branch

Plot No. 119, No.8, 11th Main road, Vijaya nagar,

Velachery, Chennai - 600 042

Tamil Nadu, India

Landmark - Reliance Digital Opposite Street

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Tambaram Branch

No.2A, 1st Floor, Duraisami Reddy Street,

West Tambaram, Chennai - 600 045

Tamil Nadu, India

Landmark - Near By Passport Seva

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - OMR Branch

No. 5/318, 2nd Floor, Sri Sowdeswari Nagar,

OMR, Okkiyam Thoraipakkam, Chennai - 600 097

Tamil Nadu, India

Landmark - Behind Okkiyampet Bus Stop,

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Porur Branch

No. 180/84, 1st Floor, Karnataka Bank Building,

Trunk Road, Porur, Chennai - 600 116

Tamil Nadu, India

Landmark - Opposite to Gopalakrishna Theatre

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Anna Nagar Branch

Plot No:1371, 28th street kambar colony,

I Block, Anna Nagar, Chennai - 600 040

Tamil Nadu, India

Landmark - Behind Reliance Fresh

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - T.Nagar Branch

Old No:146/2- New No: 48,

Habibullah Road,T.Nagar, Chennai - 600 017

Tamil Nadu, India

Landmark - Opposite to SGS Sabha

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Thiruvanmiyur Branch

22/67, 1st Floor, North mada street, Kamaraj Nagar

Thiruvanmiyur, Chennai 600041

Tamil Nadu, India

Landmark - Above Thiruvanmiyur ICICI Bank

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Siruseri Branch

No. 4/76, Ambedkar Street, OMR Road, Egatoor, Navallur,

Siruseri, Chennai 600130

Tamil Nadu, India

Landmark - Near Navallur Toll Gate, Next to Yamaha Showroom

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - Maraimalai Nagar Branch

No.37, Ground Floor, Thiruvalluvar Salai,

Maraimalai Nagar,Chennai 603209

Tamil Nadu, India

Landmark - Near to Maraimalai Nagar Arch

  +91-8099 770 770

  info@besanttechnologies.com

Besant Technologies - BTM Layout Branch

No 2, Ground floor, 29th Main Road,

Kuvempu Nagar,BTM Layout 2nd Coming from Silkboard,

AXA company signal, Stage, Bangalore - 560 076

Karnataka, India

Landmark - Next to OI Play School

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Marathahalli Branch

No. 43/2, 2nd Floor, VMR Arcade,

Varthur Main Road, Silver Springs Layout,

Munnekollal, Marathahalli, Bengaluru - 560037

Karnataka, India

Landmark - Near Kundalahalli Gate Signal

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Rajaji Nagar Branch

No. 309/43, JRS Ecstasy, First Floor,

59th Cross, 3rd Block, Bashyam Circle,

Rajaji Nagar, Bangalore - 560 010

Karnataka, India

Landmark - Near Bashyam Circle

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Jaya Nagar Branch

No. 2nd Floor,1575,11th Main Road,

4th T-Block, Pattabhirama Nagar,

Jaya Nagar, Bangalore - 560 041

Karnataka, India

Landmark - Opposite to Shanthi Nursing Home

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Kalyan Nagar Branch

No.513, 4th Cross Rd

2nd Block, HRBR Layout,

Kalyan Nagar, Bangalore - 560 043

Karnataka, India

Landmark - Opposite to kalayan nagar Axis Bank

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Electronic City Branch

No. 7, 3rd Floor, Ganga Enclave,

Neeladri Road, Karuna Nagar, Doddathoguru Village,

Electronics City Phase 1, Electronic City,

Bangalore - 560100, karnataka, India

Landmark - Adjacent to HDFC Bank and State Bank Of India

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Indira Nagar Branch

No.54, 1st Floor,

5th Main kodihalli,

Bengaluru, Karnataka 560008, India

Landmark - Behind Leela Palace Hotel,

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - HSR Layout Branch

Plot No. 2799 & 2800, 27th Main,

1st Sector, HSR Layout,

Bengaluru, Karnataka 560102, India

  +91-8767 260 270

  info@besanttechnologies.com

Besant Technologies - Hebbal Branch

No.29, 2nd Floor, SN Complex,

14th Main Road, E-Block Extention, Sahakara Nagar,

Bengaluru, Karnataka -560092, India

  +91-8767 260 270

  info@besanttechnologies.com

Scroll Up