Java reflection and interface as parameter

Question

I'm trying to invoke a method via reflection. The method in question, let's say

public void someMethod(someInterface<someObject> arg1)

I do not have access to someMethod and someInterface at runtime, and have to invoke by

someclass.getMethod("someMethod", new Class[]{Class.forName("someInterface")})
         .invoke(...)

But it fails with a ClassNotFound exception for someInterface. How do I get the Class object for interfaces?

Possible duplicate of : stackoverflow.com/questions/10635025/… — RAS
– RAS, Commented Sep 25, 2012 at 6:13

AlexR · Accepted Answer · 2010-12-23 07:18:50Z

2

I believe that you forgot the interface's package. You have to use fully qualified class name when you are calling Class.forName(), i.e. Class.forName('com.mycompany.MyClass')

answered Dec 23, 2010 at 7:18

AlexR

116k16 gold badges137 silver badges216 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

polyglot Over a year ago

You are so right. I was pulling my hairs out trying to figure out how to get Class for interface, while I just forgot that I need a fully qualified name!

Lukas Eder · Accepted Answer · 2010-12-23 07:34:44Z

2

That looks correct to me, conceptually. Check these things:

Is the interface on the classpath at run time?
Is the interface public (not package private)
Is the interface really in the default package (you have to fully qualify it)

Last but not least ;-)

Check your spelling (case-sensitive)

edited Dec 23, 2010 at 7:34

answered Dec 23, 2010 at 7:20

Lukas Eder

223k138 gold badges731 silver badges1.6k bronze badges

Collectives™ on Stack Overflow

Java reflection and interface as parameter

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related