Just a little hint, if you'd like to run jAnrufmonitor with OpenJDK and it complains it requires Java on start... simply use the RegEdit edit file offered here: https://www.janrufmonitor.de/warum-startet-janrufmonitor-nach-einem-upd… and change the directory to your OpenJDK directory (without bin), for example the file may look like this:
[HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\JRE] [HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\JRE\11.0.1] "JavaHome"="C:\\Program Files\\Java\\openjdk" "JreHome"="C:\\Program Files\\Java\\openjdk"
Perhaps you will also have to change your JAVA_HOME and PATH, see https://stackoverflow.com/questions/52511778/how-to-install-openjdk-11-… For Windows you may want to use the .msi installer for OpenJDK: https://julian.pustkuchen.com/openjdk-installer-open-source Hopefully there will be an integrated solution for jAnrufmonitor on the long term view: https://www.janrufmonitor.de/foren/topic/java-11/