The following text was written to the standard output stream when the HelloWorld.java program was executed from IntelliJ.
/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -javaagent:/opt/intellij-idea-community/lib/idea_rt.jar=33945:/opt/intellij-idea-community/bin -Dfile.encoding=UTF-8 -classpath /home/dlarosa/IdeaProjects/CS1/out/production/CS1:/home/dlarosa/IdeaProjects/CS1/SimplePainter.jar:/home/dlarosa/IdeaProjects/CS1/SimpleComposer.jar:/home/dlarosa/IdeaProjects/CS1/jfugue-4.0.3-with-musicxml.jar greetings.HelloWorld Hello world! Process finished with exit code 0