You can download the source code for the examples in the book and the solutions to the following exercises from http://www.wrox.com.
Write a program using DOM that will count the number of occurrences of each element type in an XML document and display them. The document file should be identified by the first command-line argument. The program should also accept optional, additional command-line arguments that are the names of elements. When there are two or more command-line arguments, the program should count and report only on the elements identified by the second and subsequent command-line arguments.
Implement the XML Import capability in Sketcher using SAX, rather than DOM.