# 2.1. Introduction
Java’s standard java.net.URL
class and standard handlers for various URL prefixes, unfortunately, are not quite adequate enough for all access to low-level resources. For example, there is no standardized URL
implementation that may be used to access a resource that needs to be obtained from the classpath or relative to a ServletContext
. While it is possible to register new handlers for specialized URL
prefixes (similar to existing handlers for prefixes such as http:
), this is generally quite complicated, and the URL
interface still lacks some desirable functionality, such as a method to check for the existence of the resource being pointed to.