The special Server JRE variant provided by Oracle used to include a runnable .jar distribution of the monitoring tool JConsole. As of version 10 (and I believe also since 9 already) this is not contained in the package anymore.
Is it still possible to run the tool via CLI somehow? I noticed that the JDK also does not contain the .jar anymore. However, it is still possible to launch using something like:
java --add-modules jdk.jconsole sun.tools.jconsole.JConsole
Unfortunately this does not work on the JRE.