Windows
Install new Java version
Follow instructions to install Java: Install Java
Update JAVA_HOME
If you have set the environment variable JAVA_HOME, check whether this needs updating. Commonly this will be automatically updated by the installation process.
Update service wrapper
Find the file jvm.dll in the Java installation.
Java 8: this will be in
JAVA_HOME\jre\bin\server\jvm.dll
Java 11: this will be at
JAVA_HOME\bin\server\jvm.dll
Open the tomcat configuration window:
Start the program Monitor Tomcat
If this is not available from the start menu, run the program JAVA_HOME\bin\Tomcat9w.exe
./jdk-11.0.13.8-hotspot/bin/client/jvm.dll
./jdk-11.0.13.8-hotspot/bin/server/jvm.dll
./jdk-8.0.312.7-hotspot/jre/bin/server/jvm.dl
Remove old version
Linux
Install new Java version
Follow instructions to install Java: Install Java
Update JAVA_HOME
If you have followed the standard installation instructions, you have already done this.
Update service script
cwelford@PF-000151:/mnt/c/Program Files/Eclipse Adoptium$ find . -name jvm.dll -print
./jdk-11.0.13.8-hotspot/bin/client/jvm.dll
./jdk-11.0.13.8-hotspot/bin/server/jvm.dll
./jdk-8.0.312.7-hotspot/jre/bin/server/jvm.dl
Remove old version
Delete the previous installation
cd /opt/jdk sudo rm -r [PREVIOUS VERSION]
For example
sudo rm -r /opt/jdk/jdk-11.0.13+8