The VersionInfo class contains strings that describe the implementation and specification version of the javafx pacakges. These strings are made available as properties obtained from the System Properties class.

This class serves 3 purposes: 1. It creates the JavaFX version properties to be added into the Java System Properties at the loading of the JavaFX Toolkit. The JavaFX properties are javafx.version and javafx.runtime.version. Their formats follow the specification of java.version and java.runtime.version respectively. See https://openjdk.org/jeps/223 for details. For example, an early access build of JavaFX 9 build 76 will contain the following properties: javafx.version = 9-ea javafx.runtime.version = 9-ea+76 An fcs build of JavaFX 9 build 135 will contain the following properties: javafx.version = 9 javafx.runtime.version = 9+135 2. It provides methods to access Hudson build information and timestamp. These methods can be used to uniquely identify a particular build for internal test and deployment: The method getHudsonJobName() returns the name of the Hudson job. An empty string is returned if the build isn't built on Hudson, such as a local build on a developer machine. The method getHudsonBuildNumber() returns the number of the Hudson build for a particular job. A string of zeros is returned if the build isn't built on Hudson, such as a local build on a developer machine. The method getBuildTimestamp() will returns the timestamp of the build. 3. To uniquely identify a build that isn't generated on Hudson, such as a local build on a developer machine. It substitutes the build number tag of the javafx.runtime.version string with the build timestamp. For example, a build of JavaFX 9 on a developer machine will look something like the following: javafx.version = 9-internal javafx.runtime.version = 9-internal+0-2015-08-10_22-08-04

The tags of the form @STRING@ are populated by ant when the project is built