ClassLoader Documentaion

A class loader is an object that is responsible for loading classes. The
* class ClassLoader is an abstract class. Given the * href="#name">binary name of a class, a class loader should attempt to
* locate or generate data that constitutes a definition for the class. A
* typical strategy is to transform the name into a file name and then read a
* "class file" of that name from a file system.
*
*

Every {@link Class Class} object contains a {@link
* Class#getClassLoader() reference} to the ClassLoader that defined
* it.
*
*

Class objects for array classes are not created by class
* loaders, but are created automatically as required by the Java runtime.
* The class loader for an array class, as returned by {@link
* Class#getClassLoader()} is the same as the class loader for its element
* type; if the element type is a primitive type, then the array class has no
* class loader.
*
*

Applications implement subclasses of ClassLoader in order to
* extend the manner in which the Java virtual machine dynamically loads
* classes.
*
*

Class loaders may typically be used by security managers to indicate
* security domains.