Uses of Class
javafx.util.Duration

Packages that use Duration 
Package Description
javafx.animation
Provides the set of classes for ease of use transition based animations.
javafx.concurrent
Provides the set of classes for javafx.task.
javafx.css
Provides API for making properties styleable via CSS and for supporting pseudo-class state.
javafx.css.converter
Provides various StyleConverter classes that convert CSS parsed values.
javafx.scene.control
The JavaFX User Interface Controls (UI Controls or just Controls) are specialized Nodes in the JavaFX Scenegraph especially suited for reuse in many different application contexts.
javafx.scene.media
Provides the set of classes for integrating audio and video into Java FX Applications.
javafx.util
Contains various utilities and helper classes.