To follow this first session, please install the latest Java version on your machine.

Then open a command prompt (or terminal) and type java -version and press enter/return. You should see something similar to this:

java version "15.0.2"
Java(TM) SE Runtime Environment (build 15.0.2+7)
Java HotSpot(TM) 64-Bit Server VM (build 15.0.2+7, mixed mode)

If you see a different version, then your path is most likely wrong. If you don't know how to fix that, please ask someone :-)

Once that works, type jshell and press enter/return. You should see something similar to this:

| Welcome to JShell -- Version 15.0.2
| For an introduction type: /help intro

jshell>

You are now ready to get going. Once you've had enough, type /exit and jshell will close.