Generic worker method to print out java.class.path,
sun.boot.class.path, and java.ext.dirs.
Gets DOM version info and looks for dom.jar.
Grab a couple of generally useful items, like classpath,
java version, version of this file, etc..
Get version information about a specific .jar file.
Calls getAntVersion and looks for ant.jar.
Detects if Parser2 is present and looks for crimson.jar.
Get basic or extended info about a project.
Calls Version.getVersion and looks for saxon.jar.
Finds version information from Xalan-J 1.x, 2.x, 2.2+, and
looks for xalan.jar and xml-apis.jar.
Gets version information for Xerces-J 1.x and 2.x,
and looks for xerces.jar and xmlParserAPIs.jar.
Gets information on external standards code in xml-commons
project; finds the xml-commons version as well as the
approximate versions of JAXP, DOM and SAX.
Gets JAXP version info and looks for jaxp.jar.
Get information from various project's WhichProject impls.
Gets SAX version info and looks for sax.jar.
Get simple version info about org.apache.env.Which and
related classes.
Get our file version info.
Calls xmlcommons.Version.getVersion and looks for xml-apis.jar.