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java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel (Doc ID 2939449.1)

Last updated on APRIL 25, 2023

Applies to:

Oracle Demantra Demand Management - Version 12.2.10 and later
Information in this document applies to any platform.


Upgraded to Demantra 12.2.10 or any higher version of demantra from 12.2.7 onwards

Using JRE/JDK 1.9

Access Demantra Anywhere using http://localhost:port/demantra/portal/loginpage.jsp and download and launch Demantra Local App

Launch of Demantra local app fails with java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel

Following Error can be seen in the Console 

Current Java Version Supported.
Exception in thread "main" java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel
at com.demantra.partner.client.main.PartnerApplet.connect(
at com.demantra.partner.client.main.PartnerApplet.init(
at com.demantra.partner.client.main.PartnerApplet.main(
Caused by: java.lang.ClassNotFoundException: javafx.embed.swing.JFXPanel
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(
at java.base/java.lang.ClassLoader.loadClass(


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