3. maven

http://maven.apache.org/

3.1. Help

$ mvn help:describe -Dplugin=help
$ mvn help:describe -Dplugin=help -Ddetail

3.2. Info

$ mvn help:effective-pom
$ mvn help:effective-settings

3.3. Build

$ mvn compile
$ mvn test
$ mvn verify
$ mvn package
$ mvn package -DskipTests
$ mvn clean

3.4. Install

$ mvn install
$ mvn install -Dmaven.javadoc.skip=true