JavaFX development with just JavaScript (Nashorn)

问题

Is there a way to write a JavaFX app with just JavaScript files now that Nashorn is available in Java 8? Where can I find more info or videos on this? How would you compile it?

Or is there a minimal set of bootstrapping files required?

回答1:

Yes, you can develop JavaFX programs with just JavaScript (Nashorn).

How to access JavaFX from JavaScript

Use the jjs -fx yourscript.js command line switch.

The -fx flag on jjs will bootstrap scripts using a javafx.application.Application.

There is no compile step for JavaScript, just write your script and run it with jjs -fx.

There are no bootstrapping files required.

The jjs binary and the JavaFX runtime are both shipped with the Oracle Java 8 Runtime Environment (JRE) and jjs is located in the bin directory of the JRE installation.

Sample Code

A Hello World example (copied from Jim Laskey's blog).

var Button    = Java.type("javafx.scene.control.Button");
var StackPane = Java.type("javafx.scene.layout.StackPane");
var Scene     = Java.type("javafx.scene.Scene");

$STAGE.title = "Hello World!";
var button = new Button();
button.text = "Say 'Hello World'";
button.onAction = function() print("Hello World!");
var root = new StackPane();
root.children.add(button);
$STAGE.scene = new Scene(root, 300, 250);
$STAGE.show();

Additional Resources

There are numerous web examples of running JavaFX using Nashorn scripts.