Thread: Method injection

I am invoking a method from a class I obtained by using a URLClassLoader. Which is giving me the following exception.

java.lang.reflect.InvocationTargetException

The line that gives this exception is

public static Object invoked(String aClass, String aMethod, Class[] params,
			Object[] args) throws Exception {
 
		Method m = mine.getDeclaredMethod(aMethod, params);
		Object i = mine.newInstance();
		Object r = m.invoke(i, args);//this line :(
		return r;
	}

and is called here...

try {
				Object a = invoked("Script name", "method4", new Class[] {},
 
				new Object[] {});
				boolean b = (Boolean) a;
 
				return b;
			} catch (Exception e2) {
				e2.printStackTrace();
			}

Edit: The class name isn't used, avoiding any confusing.

The method has no parameters either, why is it giving that exception and what does it mean?