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 Tomcat Monitor window. If you need further details on how to open this, see: Tomcat start/ stop, open properties

Go to the Java tab. Update the Java Virtual Machine setting to the new location of jvm.dll.

Remove old version

Installation of the new version of Java should remove the previous version, but you should confirm that the previous version has been removed by examining the list of installed programs.

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