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Because this unordered property is often unexpected, problems direct comparisons with NaN must not be performed. Problems can arise when programmers write code that compares floating-point values without considering the semantics of NaN. For example, input validation checks that fail to consider the possibility of a NaN value as input can produce unexpected results. See rule "NUM08-J. Check floating-point inputs for exceptional values" for additional information.
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="b9e64a379cc6953c-42cd3c63-47eb4bfb-960c9ded-6ba9c58dc7861ba871879aa1"><ac:plain-text-body><![CDATA[ | [[FindBugs 2008 | AA. Bibliography#FindBugs 08]] | FE: Doomed test for equality to NaN | ]]></ac:plain-text-body></ac:structured-macro> | |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="c1379c9029c1cd3e-0c9fb207-42764ae1-a08592b2-8d8b17bc1a33fa196f3bf9a4"><ac:plain-text-body><![CDATA[ | [[JLS 2005 | AA. Bibliography#JLS 05]] | [§4.2.3, "Floating-Point Types, Formats, and Values" | http://java.sun.com/docs/books/jls/third_edition/html/typesValues.html#4.2.3] | ]]></ac:plain-text-body></ac:structured-macro> |
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