Class Observer

  • public class Observer
extends java.lang.Object
    This class observes the changes of an integer property in a set of observable objects. It holds a set of settable objects. When the property changes the observer sets the new value of the property to each settable object.

    Generally, observers have methods to add and remove observables. For simplicity, here all the observable are set in one shot. This is less general, but it suffices for this problem and is less distracting.

    • Constructor Summary

      Constructors 
      Constructor Description
      Observer()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void setSettable​(Settable[] settable)
      Set the observable of this observer.
      void update​(Settable originator, int newValue)
      Update the settables with a new value.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Observer

        public Observer()

    • Method Detail

      • setSettable

        public void setSettable​(Settable[] settable)
        Set the observable of this observer.
        Parameters:
        settable - The array of objectobservable to set.

      • update

        public void update​(Settable originator,
                   int newValue)
        Update the settables with a new value.
        Parameters:
        newValue - The new value to set in the settable.