Creating a ClassLoader?

[Dillinger4]

This is pretty much what they have. So it seems that the loadClass() method is overridden.

What i dont understand is the check to see if the class is already loaded in the loadClass() method. If findClass() cannot find the class then a ClassNotFoundException is thrown but then the rest of the code in the loadClass() method is skipped.

public class Y{
   public static void main(String[] args){
   try{
   Class c;
   Loader l = new Loader();
   c = l.loadClass("C:\\Java\\E.class");
   }catch(ClassNotFoundException e){System.err.println(e);}
  }
 }

import java.io.*;

 public class Loader extends ClassLoader{ 

   protected Class findClass(String classname) throws ClassNotFoundException{
    byte[] classbytes = null;  
   try{
     Scanner s = new Scanner(classname); 
     classbytes = s.getByteCode();
     }catch(IOException e){System.err.println(e);
   } 
   if(classbytes != null){
      return defineClass(classname, classbytes,0,classbytes.length);
     }
     throw new ClassNotFoundException(classname);
  }

  public Class loadClass(String name) throws ClassNotFoundException{
   // check if the class is already loaded   
      Class loadedclass = findClass(name); 
      if(loadedclass == null){
      // search for class in local repository before delegating
      //.........
      // if class not found delegate to parent
     loadedclass = this.getClass().getClassLoader().loadClass(name);
   }
   return loadedclass;
  } 
 }