Java9 Jigsaw

"So what is a module?
Describing a module is actually quite simple – it is a unit of software that declares the answers to three questions about itself in a file named module-info.java:

• What is its name?
• What does it export?
• What does it require?"

More info here: https://blog.codecentric.de/en/2015/11/first-steps-with-java9-jigsaw-part-1/