Java 8 ... explained in ... minutes
https://blog.idrsolutions.com/2014/10/5-minutes-explanation-java-lambda-expression/ https://blog.idrsolutions.com/2014/11/java-8-streams-explained-5-minutes/ https://blog.idrsolutions.com/2015/01/java-8-default-methods-explained-5-minutes/ https://blog.idrsolutions.com/2015/03/java-8-consumer-supplier-explained-in-5-minutes/