Java: proper way to get the class of a primitive array for reflection

Question

I'm trying to use reflection to call a method that takes in a byte array.

I'm starting off doing:

Class myClass = anObject.getClass();
Class[] parameterTypes =
 {byte[].getClass();};

But that doesn't work (class expected, } expected) on the byte[] line. Anyone know what I should do? Cast to an Object and declare that the method takes an Object?

Somnath Muluk · Accepted Answer · 2012-03-28 05:31:24Z

12

Try this:

Class[] parameterTypes = new Class[] {byte[].class};

edited Mar 28, 2012 at 5:31

Somnath Muluk

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answered Jul 9, 2009 at 22:53

ChssPly76

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4 Comments

jbu Over a year ago

great, thanks, that worked. I don't really understand why Integer[] x = {5}; and Integer[] y = {new Integer(5)}; work.

ChssPly76 Over a year ago

Well, Class[] parameterTypes = {byte[].class} works too, as do your examples. The problem with your original code is trying to invoke getClass() instance method on byte[] declaration.

Tom Hawtin - tackline Over a year ago

(And that should probably be Class<?>[].

David Moles Over a year ago

Integer[] x = {5} works because 5 is autoboxed -- equivalent to Integer.valueOf(5).

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