Uses of Interface

Packages that use Observer 
Package Description
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
  • Uses of Observer in java.util

    Methods in java.util with parameters of type Observer 
    Modifier and Type Method Description
    void Observable.addObserver​(Observer o)
    Adds an observer to the set of observers for this object, provided that it is not the same as some observer already in the set.
    void Observable.deleteObserver​(Observer o)
    Deletes an observer from the set of observers of this object.