JDK 11 or newer is required to properly build the application.
A complete build can be issued with:
gradlew build
JRE 11 or newer is required to properly run the application.
The easiest way to run JourNow is to use run task:
gradlew run
Otherwise, the application can be packed into a single .jar file with:
gradlew uberJar
Then, it can be found in journow-ui/build/libs/journow-ui-<version>-uber.jar