this project demonstrates how you would build your own jar with third party dependencies, that later can be used as external lib in other projects

code from here: https://mkyong.com/gradle/gradle-create-a-jar-file-with-dependencies/

how to build

./gradlew clean
./gradlew fatJar

then you will get your .jar in ./build/libs/gradle-jar-test-log-1.0.jar

how to run (after build)

java -jar ./build/libs/gradle-jar-test-log-1.0.jar

use as external lib in other project

you can use this gradle-jar-test-log-1.0.jar as a dependency in other projects