Java slice notation is a real boon to Java developers. This article explains slice notation and how to use it in Boon. Many languages have slice notation (Ruby, Groovy and Python). Boon adds slice notation to Java. With Boon you can slice strings, arrays (primitive and generic), lists, sets, tree sets, tree map's and more. You can use Boon slice notation to search TreeMaps and TreeSets. With Boon, slicing primitive arrays does not use auto-boxing so it is very efficient. Boon is "Simple opinionated Java for the novice to expert level Java Programmer". Boon is a "Low Ceremony. High Productivity" framework. It is meant to be a "real boon to Java to developers!" Boon has three slc operators: slc, slc (start only), and slcEnd.