How to install OpenJDK on Windows

This article describes how to update your Blancco Management Console environment from Oracle Java to OpenJDK.

Uninstalling existing (Oracle) Java

1. Stop Blancco Management Console service
2. Uninstall any existing Java version(s) from the machine
3. Restart the machine
4. Check that Java was successfully uninstalled
   1. Open Command Prompt
   2. Type java -version to check the currently installed version of Java. If no Java is installed you should see below error message
      

Installing OpenJDK

1. Download the latest version of OpenJDK from https://jdk.java.net/
2. Select "Windows/x64" to download the zip file
   
3. Extract the zip file to a location where you want to install the OpenJDK (for example C:\Program Files\Java)
   

Updating System Variables

1. Navigate to Control Panel > System and Security > System
2. Select "Advanced System Settings" from the left panel
3. Open Environment Variables by going to "Advanced"-tab and then click "Environment Variables"
   
4. Under the "System Variables select "New"
   
5. Name the new variable as "JAVA_HOME" (without quotation marks). Variable value should point to the directory where the OpenJDK zip file was extracted (in this example C:\Program Files\Java\jdk-11.0.1\)
   

Updating the "Path" system variable

1. Under the "Environment Variables" > "System variables" look for existing variable named as "Path"
2. Select it and click "Edit..."
3. At the end of the variable value add new entry pointing to your OpenJDK bin directory (separated by semicolon from the previous entry)
   1. For example if OpenJDK was extracted to C:\Program Files\Java\jdk-11.0.1, the path entry would be C:\Program Files\Java\jdk-11.0.1\bin