If you've manually installed Oracle Java it doesn't show up in the Dash (as far as I know).
- Open a terminal
Execute the following command:
/usr/bin/jdk1.8.0_05/bin/ControlPanelReplace
/usr/bin/jdk1.8.0_05by the path of your Java installation.
Where is the ControlPanel for Java?
Is there Java Control Panel in java -16? - Stack Overflow
where can I find the java "control panel"? - Kubuntu Forums
Java configuration console
If you've manually installed Oracle Java it doesn't show up in the Dash (as far as I know).
- Open a terminal
Execute the following command:
/usr/bin/jdk1.8.0_05/bin/ControlPanelReplace
/usr/bin/jdk1.8.0_05by the path of your Java installation.
Open a terminal (Ctrl-Alt-T) and start
ControlPanel
Just a few moments later the Java Control Panel appeared. I haven't checked yet, but it may be necessary to
sudo ControlPanel
to save your changes.
Hi
Have to use an app that runs Java and I need to add some settings in the control panel. The thing is I can't find it and there isn't any info in the wiki. I have both JRE and JDK installed from AUR.
Thanks
You have openjdk-8-jdk installed in Ubuntu 18.04. You can use exactly the same command line utilities with OpenJDK as with Oracle JDK, but ControlPanel and jcontrol do not exist in openjdk-8-jdk in Ubuntu 18.04.
The GUI in openjdk-8-jdk in Ubuntu 18.04 is named JConsole. The JConsole graphical user interface is a monitoring tool that uses the extensive instrumentation of the Java Virtual Machine (Java VM) to provide information about the performance and resource consumption of applications running on the Java platform. Once you have connected JConsole to an application, JConsole is composed of six tabs: Overview, Memory, Threads, Classes, VM Summary and MBeans.
$ java -version openjdk version "1.8.0_222" OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~18.04.1-b10) OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode) $ which java /usr/bin/java $ cd /usr/bin # path to jconsole $ jconsole
The command jconsole will open the JConsole window.

in bash run
locate itweb-settings
and than run what it found, for example
/etc/alternatives/itweb-settings