Reflection - Invoking method returns an exception

[crikey]

I keep getting this error whenever i invoke a method:

Exception in thread "main" java.lang.IllegalArgumentException: object is not an instance of declaring class
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.zbot.boot.ZBot.main(ZBot.java:56)

Here is my code (ignore the "AppletClass part"):

Class clazz = AppletClass.getComponentAt(1, 1).getClass();
        Method[] m = clazz.getMethods();
        Method Gr = null;
		for (Method t : m) {
			if (t.getName().contains("mouseDrag")){
			System.out.println(t.toGenericString());
			Gr = t;
			}
		}

		Object o = Gr.invoke(clazz, Event.MOUSE_MOVE, 100, 100);

Im trying to get the mouseDrag method so i could send events to it.

[JosAH]

You should invoke a method on a specific object; you got that Method from the object AppletClass.getComponentAt(1, 1) so that's where you should invoke the method on:

Object o = Gr.invoke(AppletClass.getComponentAt(1. 1), Event.MOUSE_MOVE, 100, 100);

and not on a Class object as you did. Also read the API documentation for the Method class; it's all in there ...

kind regards,

Jos

[DarrylBurke]

object is not an instance of declaring class

It isn't. It's an instance of java.lang.Class.

db

edit Grrrr...

[crikey]

Sweet it works :)
Except now, Im getting a IllegalArgumentException, and i know why. That method mouseDrag requires for its parameters a:
Event event
int x
int y
But what am I suppose to put for Event? I tried Event.MOUSE_MOVE but that's an integer. Any thoughts? Thanks!

[JosAH]

Sweet it works :)
Except now, Im getting a IllegalArgumentException, and i know why. That method mouseDrag requires for its parameters a:
Event event
int x
int y
But what am I suppose to put for Event? I tried Event.MOUSE_MOVE but that's an integer. Any thoughts? Thanks!

Read the API documentation for the MouseEvent class; create one and pass it to your method.

kind regards,

Jos