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Assertions should not be used to validate parameters of {{public}} methods. According to the Java Language Specification \[[JLS 052005|AA. Java References#JLS 05]\], section 14.10 "The {{assert}} Statement":

\[[JLS 052005|AA. Java References#JLS 05]\] 14.10 The assert Statement
\[[Bloch 082008|AA. Java References#Bloch 08]\] Item 38: Check parameters for validity
\[[ESA 052005|AA. Java References#ESA 05]\] Rule 68: Explicitly check method parameters for validity, and throw an adequate exception in case they are not valid. Do not use the assert statement for this purpose
\[[Daconta 032003|AA. Java References#Daconta 03]\] Item 7: My Assertions Are Not Gratuitous