Pizza POS (OOP and FP Style) This is the code from My JVM Meet up Talk. You can get the Slides here Requirements Install Java SDK 11 Use sdkman $ curl -s "https://get.sdkman.io" | bash $ source "$HOME/.sdkman/bin/sdkman-init.sh" $ sdk version $ sdk install java Install Gradle 5.3 or higher $ sdk update $ sdk install gradle