How to use Class.getMethod() by primitive type parameter?

I have to use Class.getMethod('methodname',paramA) to load a 'methodname(float)' method,paramA={new Float(13.0)},but when run it, throw a nosuchmethod exception,how JVM distinguish the primitive type parameter and its wrapper?

you have to use the float.class (not Float.class) when looking up primitive methods that take floats.
Other primitives follow the same format:
int.class, double.class, boolean.class, etc. The only problem with this is that I don't think that it's possible to dynamically determine these class names (i.e., you can't pass in a String and do a Class.forName() on it); instead, you have to have a bunch of if/elses to test the string.

thanks,it work.

Here's an exercise I did in reflection, inspired by a magazine article with a great idea and code that made me wince. You might step through ThingTester with a debugger and see how it handles int and Integer parameters. I guess I should post a ZIP of the source as well as the HTML version. Something to do tomorrow night. (Kill Bill tonite!) (Next day: Kill Bill rocks!)
Interpreter
[ October 14, 2003: Message edited by: Stan James ]