MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE Reference page 328

304 CFML Language Reference
valid Java type (simple, arrays, objects). ColdFusion does the appropriate conversions
when strings are passed as arguments, but not when they are received as return values.
Overloaded methods are supported as long as the number of arguments are different.
Future enhancements will let you use cast functions that will allow method signatures
to be built more accurately.