that *might* be because MyClass, like all(?) other classes in processing is an inner class of the main papplet class

http://download.oracle.com/javase/tutorial/java/javaOO/innerclasses.html

export your application and look at the generated .java file

or it could be that getMethod() takes two parameters according to the javadoc here:

http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Class.html#getMethod(java.lang.String, java.lang.Class[])

you have to specify the formal parameters of the method you're looking for, not just the name

try using getMethods() and printing out everything that's returned.

er, was the second one:

1. import java.lang.reflect.Method;
2. 
   
3. void setup() {
4.   MyClass cls = new MyClass();
5.   Class[] classes = new Class[0];
6.   Method[] methods = cls.getClass().getMethods();
7.   println("Methods: " + methods.length);
8.   for (int i = 0 ; i < methods.length ; i++) {
9.     println("Method: " + methods[i]);
10.   }
11.   try {
12.     println(cls.getClass().getMethod("mymethod", new Class[]{}));
13.   } catch (Exception e) {
14.     println("Exception:" + e);
15.   }
16. }
17. 
    
18. public class MyClass{
19.   MyClass(){
20.   }
21.   public void mymethod(){
22.   }
23. }

Oh! thank you very much.

the returned Method has an invoke() method

http://download.oracle.com/javase/1.4.2/docs/api/java/lang/reflect/Method.html

general details here:
http://java.sun.com/developer/technicalArticles/ALT/Reflection/

but this reflection stuff is tricky and often unnecessary. are you sure you need it?

Thanks for the reply