update-alternatives --config java This will present you with a list of the different versions of Java you have installed. Each version will be associated with a number, starting with 0.

How install Java 21 on Windows Follow these steps to quickly install Java 21 on your operating system: Navigate to jdk.java.net and download your platform’s zip file. Extract the Java 21 zip file to a ...

If you do have a problem where Jenkins on localhost 8080 is not working, verify that the JDK is installed and the Java utilities in the JDK’s bin directory are on the PATH. This can be accomplished ...