OpenJFX chopping dialog windows

Question

I'm using Linux and trying to switch from Oracle's JDK to OpenJDK and OpenJFX, but I'm having severe problems with JavaFX applications.

Take for example this simple program:

import javafx.application.Application;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.stage.Stage;

public class AlertTest2 extends Application {
    @Override
    public void start(final Stage primaryStage) throws Exception {
        final Alert alert = new Alert(AlertType.INFORMATION, "test alert");
        alert.setContentText("content goes here");
        alert.showAndWait();
    }

    public static void main(final String... args) {
        launch(args);
    }
}

If I run it with the Oracle JDK version 8, it works perfectly fine and shows an alert window. But with OpenJDK and OpenJFX version 11, all I get is this:

I also tried ZuluFX version 8 (a build of OpenJDK with OpenJFX included), and it works correctly about 1 out of 8 times, the other times chopping the alert dialog as shown above.

Has anybody else encountered this problem? What could be causing it and how can I fix it?

Answer 1

After some digging, I found this bug: https://github.com/javafxports/openjdk-jfx/issues/222

Here is a workaround (from that page) that seems to help:

alert.setResizable(true);
alert.setOnShown(ev -> Platform.runLater(() -> alert.setResizable(false)));
alert.showAndWait();