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The Java compiler type checks the arguments to each varargs method to ensure that the arguments are of the same type or object reference. However, the compile-time checking is ineffective when {{Object}} or generic {{T}} parameter types are used \[java:[Bloch 2008|AA. Bibliography#BlochReferences#Bloch 08]\]. 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. |
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Retrofitting old methods containing final array parameters with generically-typed varargs is not always a good idea. For example, given a method that does not accept an argument of a particular type, it could be possible to override the compile-time checking --- through the use of generic varargs parameters --- so that the method would compile cleanly rather than correctly, causing a compile-time error \[java:[Bloch 2008|AA. Bibliography#BlochReferences#Bloch 08]\]. |
Also, note that autoboxing does not allow strong compile-time type checking of primitive types and their corresponding wrapper classes.
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