6:54 pm - Saturday September 22, 2018

IS-A HAS-A Relationship in Java

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IS-A HAS-A Relationship

  • IS-A refers to inheritance or implementation.
  • IS-A is expressed with the keyword extends.
  • HAS-A means instance of a class, member variable that can 
    be accessed by an object can be expressed as has a relationship .

Example:

<pre>class Car extends Vehicle

{

String door;

}

Correct answer

a)      Car is a vehicle

b)      Vechile has a engine

c)      Car has a engine

d)       Car has a door

wrong answer

a)      vehicle is a Car 

b)      Vechile has a door

c)      vehicle has a Car 


Filed in: Core Java Tutorial

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