Formal comment #216 (defect) Capitalize "Boolean." Reported by: Arthur A. Gleckler Version: 5.92 In <4.6 Boolean values> and throughout, capitalize "Boolean" when referring to that data type in English text. Java's capitalization- based distinction between the primitive and non-primitive names for that type, among other things, has made it easy to forget that Boolean is named after a person, and is therefore a proper noun. RESPONSE: The word is usually capitalized when used as an adjective, e.g. Boolean logic, but not so much when used as a noun, and especially not when used as the name of a data type in a programming language unless the language capitalizes the names of all (or all basic) types. See e.g. http://www.nist.gov/dads/HTML/boolean.html http://cristal.inria.fr/ICFP2001/prog-contest/task.html http://www.cs.cornell.edu/icfp/task.htm http://www.lfcs.inf.ed.ac.uk/software/polyml/docs/Basis2.html http://msdn2.microsoft.com/en-us/library/aa691320(vs.71).aspx http://phpro.org/en/language.types.boolean.html Therefore the formal comment's suggestion will not be adopted.