| Package | Description | 
|---|---|
| javafx.concurrent | 
 Provides the set of classes for javafx.task. 
 | 
| javafx.scene.web | 
 This package provides means for loading and displaying Web content. 
 | 
| Class and Description | 
|---|
| ScheduledService
 The ScheduledService is a  
Service which will automatically restart
 itself after a successful execution, and under some conditions will
 restart even in case of failure. | 
| Service
 
     A Service is a non-visual component encapsulating the information required
     to perform some work on one or more background threads. 
 | 
| Task
 
     A fully observable implementation of a  
FutureTask. | 
| Worker
 
     A Worker is an object which performs some work in one or more background
     threads, and who's state is observable and available to JavaFX applications
     and is usable from the main JavaFX Application thread. 
 | 
| Worker.State
 
     The state of a Worker. 
 | 
| WorkerStateEvent
 An event which occurs whenever the state changes on a Worker. 
 | 
| Class and Description | 
|---|
| Worker
 
     A Worker is an object which performs some work in one or more background
     threads, and who's state is observable and available to JavaFX applications
     and is usable from the main JavaFX Application thread. 
 | 
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