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The Java compiler type-checks the arguments to a varargs method to ensure that they are of the same type or object reference. However, the compile-time checking is ineffective when two method signatures are used in particular - {{Object}} and the generic type {{T}} \[[Bloch 082008|AA. Java References#Bloch 08]\]. Another requirement for providing strong compile-time type checking of variable argument methods is to be as specific as possible when declaring the type of the method parameter.

Retrofitting old methods containing {{final}} array parameters with generically typed varargs is not always a good idea. This is because if some method did not accept an argument of a particular type, it may be possible to override the compile-time checking so that with the use of generic varargs, it now compiles cleanly \[[Bloch 082008|AA. Java References#Bloch 08]\]. 

\[[Sun 062006|AA. Java References#Sun 06]\] [varargs|http://java.sun.com/j2se/1.5.0/docs/guide/language/varargs.html] 
\[[Bloch 082008|AA. Java References#Bloch 08]\] Item 42: "Use varargs judiciously"
\[[Steinberg 052005|AA. Java References#Steinberg 05]\] "Using the Varargs Language Feature"