Welcome to this web site, which hosts the support materials for the second edition of the book "Foundational Java" by David Parsons, published in 2020. The first edition was published in 2012 and was based on Java 7, so the second edition updates coverage of the language to Java 15.
This site includes the support materials for both editions of the book. Note that materials for the first edition used to be on introjava.com, but that URL is no longer associated with the book.