To whom it may concern: Running Apache NetBeans 12.3 in my GraphicsCore project folder, I did a clean and build on the project, and then ran its test.GraphicsTest program directly in NetBeans. It ran with no errors.
But then I executed the following commands: $ cd dist $ ls GraphicsCore.jar lib README.TXT $ java -jar GraphicsCore.jar Error: JavaFX runtime components are missing, and are required to run this application Although there was an error, the following commands show the JavaFX libraries are present and properly referenced in GraphicsCore.jar. $ ls lib javafx.base.jar javafx.fxml.jar javafx.media.jar javafx-swt.jar javafx.controls.jar javafx.graphics.jar javafx.swing.jar javafx.web.jar $ unzip -c GraphicsCore.jar META-INF/MANIFEST.MF Archive: GraphicsCore.jar extracting: META-INF/MANIFEST.MF Manifest-Version: 1.0 Ant-Version: Apache Ant 1.10.4 Created-By: 13.0.1+10-MTS (Azul Systems, Inc.) Class-Path: lib/javafx.base.jar lib/javafx.controls.jar lib/javafx.fxm l.jar lib/javafx.graphics.jar lib/javafx.media.jar lib/javafx.swing.j ar lib/javafx.web.jar lib/javafx-swt.jar Main-Class: test.GraphicsTest So why the error in the java -jar command when there are no problems running directly in NetBeans? Here is the Java platform on which I ran the above commands. $ java --version openjdk 13.0.1 2019-10-15 OpenJDK Runtime Environment Zulu13.28+11-CA (build 13.0.1+10-MTS) OpenJDK 64-Bit Server VM Zulu13.28+11-CA (build 13.0.1+10-MTS, mixed mode, sharing) I was using the Gluon JavaFX 15 runtime, JavaFX Linux SDK downloaded from https://gluonhq.com/products/javafx/. For system information, I ran the following linux commands on a System76 Darter Pro Laptop, version darp6. $ uname --machine x86_64 $ uname --operating-system GNU/Linux $ uname --kernel-name Linux $ uname --kernel-release 5.4.0-48-generic $ uname --kernel-version #52~18.04.1-Ubuntu SMP Thu Sep 10 12:50:22 UTC 2020 Gary Shute