code: private Class findBaseClass(String name) throws ClassNotFoundException {
          return parent == null ? findSystemClass(name) : parent.loadClass(name);
      }
docs: Finds a system class (which should be loaded from the same classloader
  as the Ant core).
  
  For JDK 1.1 compatibility, this uses the findSystemClass method if
  no parent classloader has been specified.
  
  @param name The name of the class to be loaded.
  Must not be <code>null</code>.
  
  @return the required Class object
  
  @exception ClassNotFoundException if the requested class does not exist
  on this loader's classpath.