Maven tips

build a new maven project:

mvn archetype:generate -DgroupId=com.mycompany.helloworld -DartifactId=helloworld -Dpackage=com.mycompany.helloworld -Dversion=1.0-SNAPSHOT

cd helloworld

mvn package

java -cp target/helloworld-1.0-SNAPSHOT.jar com.mycompany.helloworl

help to get more information

mvn help:effective-pom

clean the target folder

mvn clean 

mvn compile
mvn test
mvn install