Find a class or resource on the supplied classpath, or the system classpath if none is supplied. The named property is set if the item can be found. For example

 <whichresource resource="/log4j.properties" property="log4j.url" > 

Attribute	Description	Type	Requirement
property	the property to fill with the URL of the resource or class	String	Required
class	name the class to look for	String	Exactly one of these two
resource	name the resource to look for	String
classpath	Set the classpath to be used for this compilation.	Path	Optional

classpath (org.apache.tools.ant.types.Path)

Adds a path to the classpath.