[Processing] Reflection Test [Java, Reflection API]

CallerWithoutParams.pde

import java.lang.reflect.*;

class CallerWithoutParams{
  /**
  @param o  the object which contains the method to call, 
            when passing 'this' from within the processing main sketch,
            all functions in your main sketch will be recognized 
            (setup(), draw(),..., custom methods)  
  @param m  the name of the method to call without "()"
  */
  public void callMeBackPlease(Object o, String m){
  {
    if(o==null || m=="" || m==null){
      println("There was an error with your arguments");
      return;  
    }
     try {
        Class c = o.getClass();
        Method method = c.getDeclaredMethod(m, null);
        method.invoke(o);
     }
     catch (Throwable e) {
        System.err.println(e);
     }
   }
  }
}

CallerWithParams.pde

import java.lang.reflect.*;
import java.io.File;

class CallerWithParams{
  /**
  @param o  the object which contains the method to call, 
            when passing 'this' from within the processing main sketch,
            all functions in your main sketch will be recognized 
            (setup(), draw(),..., custom methods)  
  @param m  the name of the method to call without "()"
  */
  public void callMeBackPlease(Object o, String m){
  {
    if(o==null || m=="" || m==null){
      println("There was an error with your arguments");
      return;  
    }
     try {
        Class c = o.getClass();
        //Method m[] = c.getDeclaredMethods();
        //for (int i = 0; i < m.length; i++)
        //System.out.println(m[i].toString());
        Class parTypes[] = new Class[1];
        //File dumbFile = new File("");
        //Class<? extends File> fileClass = dumbFile.getClass(); 
        //parTypes[0] = fileClass;
        parTypes[0] = new String("").getClass();
        Method method = c.getDeclaredMethod(m, parTypes);
        Object[] params = new Object[1];
        //params[0] = new File("C:\\Users\\Powder\\Desktop\\test.txt");
        params[0] = new String("WAZZUPPPP??");
        method.invoke(o, params);
     }
     catch (Throwable e) {
        System.err.println(e);
     }
   }
  }
}

reflectionTest.pde

/**
 * Author: Tim Pulver
 * Date: 2011
 * 
 * Tested with Processing 2.0a6
 *
 * A test for the java reflection API, which is useful if you want to call a function at runtime by it's name.
 */

void setup(){
  CallerWithoutParams cwop = new CallerWithoutParams();
  CallerWithParams cwp = new CallerWithParams();
  cwop.callMeBackPlease(this, "callMe");
  cwp.callMeBackPlease(this, "callMe");
}

void callMe(){
  println("Yeah I got called......(no one answering)");
}

void callMe(String s){
  println("Yeah I got called......" + s);
}