Launching Class File with URLClass Loader

Question

Before anyone flames me I want toe explain that I have searched the forums and the deveolper section and though I have found a lot of useful information I am still not sure what I am missing. It may be something small that I am just over looking so if someone could look over my code I would greatly appreciate it.
I am making a class with a URLClassLoader with which I can launch another java class file. At this stage the class merely takes the path to the file and the name of the class file as command line arguements. This attempt was just a test so I could implement it into another application. The code itself was almost taken completely from a trial on the developer part of this site. The issue I am running into is that nothing appears to launch. I can run the app from the command line and pass the arguements, however the class file I pass never appears to launch. I do not receive any errors at all. Any ideas what I am missing or doing wrong?
import java.net.*;
import java.io.*;
public class Launcher
     public static void main(String args[])
          try
               File daPath = new File(args[0]);
               System.out.println(daPath.toString()); //output
               URL daPathURL[] = {daPath.toURL()};
               ClassLoader daLoader = new URLClassLoader(daPathURL);
               Class daClass = daLoader.loadClass(args[1]);
               System.out.println("loaded " + daClass.toString()); //output
               Object daObj = daClass.newInstance();
               System.out.println("new instance"); //output
          }catch(MalformedURLException e){
               e.printStackTrace();                    
          }catch(ClassNotFoundException e){
               e.printStackTrace();
          }catch(InstantiationException e){
               e.printStackTrace();
          }catch(IllegalAccessException e){
               e.printStackTrace();
}

Answer 1

Are we talking about a new main class here with an main method.
To run such a class you don't instaciate it (it does that itself). You need to load the class then invoke the main method.
Something like:
String[] otherArgs = String[args.length - 2]; // copy args except first two
System.arrayCopy(args, 2, otherArgs, 0, args.lenght - 2];
Method mainMethod = dClass.getMethod("main", new Class[]{String[].class});
mainMethod.invoke(null, new Object[]{otherArgs});