Module javafx.controls not found in Java 9

Question

I have two JPMS module in two files: modulea.jar and moduleb.jar. Modulea requires javafx.controls module. I need to use these modules in new layer, so I do:

ModuleFinder finder = ModuleFinder.of(modAPath, modBPath);
ModuleLayer parent = ModuleLayer.boot();
Configuration cf = parent.configuration().resolveAndBind(finder, ModuleFinder.of(), new HashSet<>());
ClassLoader scl = ClassLoader.getSystemClassLoader();
ModuleLayer newLayer = parent.defineModulesWithOneLoader(cf, scl);

I thought that JDK modules will be loaded automatically but I get

Exception in thread "main" java.lang.module.FindException: Module javafx.controls not found, required by modulea
    at java.base/java.lang.module.Resolver.findFail(Resolver.java:889)
    at java.base/java.lang.module.Resolver.resolve(Resolver.java:191)
    at java.base/java.lang.module.Resolver.bind(Resolver.java:297)
    at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:428)
    at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:230)

At the same time when I do: java --list-modules, the output is:

...
javafx.base@9
javafx.controls@9
javafx.deploy@9
javafx.fxml@9
javafx.graphics@9
javafx.media@9
javafx.swing@9
javafx.web@9

How to fix it?

Is there a reason you didn’t simply put requires javafx.controls; in your module-info.java? — VGR
– VGR, Commented Sep 21, 2017 at 18:00
@VGR Sorry, didn't understand you. In modulea module-info I have requires javafx.controls. — user5182503
– user5182503, Commented Sep 21, 2017 at 18:02
The JDK modules can be accessed already using the parent layer. How else are you trying to access them? — Naman
– Naman, Commented Sep 21, 2017 at 18:02
The javafx.controls module must not be in the boot layer. You can force it into the boot layer by running with --add-modules javafx.controls but it would be interesting to know more about the initial module - is this your own launcher/container module that only requires java.base? If so then you may want to run with --add-modules ALL-SYSTEM to ensure that all system modules are in the boot layer as it's unknown what applications it launches might require. — Alan Bateman
– Alan Bateman, Commented Sep 21, 2017 at 18:14
@Alan Bateman Thank you for your comment. Ok. javafx.controls must not be in boot layer. However, I need it only for this layer, but not for any other layers. How can I add it dynamically to this layer? Answering to your question - in boot layer I have a launcher for other layers which needs java.base, java.rmi and some others but not any javafx.*. — user5182503
– user5182503, Commented Sep 21, 2017 at 18:53

score 1 · Accepted Answer · 2018-11-21 10:42:14Z

1

From @AlanBateman's comment:

The javafx.controls module is not loaded by default. You can force it into the boot layer by running with --add-modules javafx.controls.

NOTE: Starting with Java 11 JavaFX is a separate project.

edited Nov 21, 2018 at 10:42

answered Nov 19, 2018 at 13:25

user5182503

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