Install JDK 20 and add the jdk-20/bin path to the PATH environment variable.
Test that it is installed correctly:
> java --version
java 20.0.1 2023-04-18
Java(TM) SE Runtime Environment (build 20.0.1+9-29)
Java HotSpot(TM) 64-Bit Server VM (build 20.0.1+9-29, mixed mode, sharing)
java -jar .\ScotlandYard.jar