## Uses of Class
java.util.Observable

Packages that use Observable
java.util: Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).

### Uses of Observable in java.util

Methods in java.util with parameters of type Observable
`void` Observer.`update(Observable o, Object arg)` This method is called whenever the observed object is changed.