What is Instance Variable?

What is Instance Variable?

Instance Variable is a variable that is defined within a class, and it exists as long as the object exists. An example is the Bee class, which has two variables nectarCapacity and maxNectarCapacity:

public class Bee {

   /**
    * Current nectar capacity
    */
   private double nectarCapacity;

   /**
    * Maximal nectar that can take bee.
    */
   private double maxNectarCapacity = 20.0;

  ...
}