How to determine the object type?

Question

Hi,
I got a method that is of the following signature:
Object result = method.invoke(object,args);The result can be any type from primitive types like double to class type.
How can I determine whether the result object is of what type?
I am thinking of using
(if result instanceof Double)
      //do something
}However, the method call invoke can return a primitive type double, so will the above method
(if result instanceodf Double) be called?
Thanks.

Answer 1

However, the method call invoke can return a primitive
type double, so will the above method
(if result instanceodf Double) be called?(result instanceof Double) will be true because quoting the javadocs for Method.invoke(): "if the value has a primitive type, it is first appropriately wrapped in an object."
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/reflect/Method.html#invoke(java.lang.Object,%20java.lang.Object[])