John O'Hanley Email and Phone Number

B.Sc. in Physics (1984). Worked in Financial Industry in Toronto for about 10 years before moving into a career in programming starting in 1998. Intelligent, fast learner. His taste in programming leans towards simplicity and minimalism. Involved in open source projects. Lives in Moncton, New Brunswick.Created javapractices.com in 2002, a reference and learning site for Java programmers. The site has over 2 million unique visitors per year, from all over the world. Wikipedia links to this site in several places (for example, the pages on immutable object, lazy initialization, and static import).Released web4j in 2003 (web4j.com) - a simple web application framework for connecting web apps to a relational database. This project is now open source.In 2008, he coined the terms "package-by-feature" and "package-by-layer" on javapractices.com, to help people clarify how their code can be arranged in directories. These terms have been adopted by a number of other programmers, including some outside the Java community.In 2008 he published two technical articles on javaworld.com.Released date4j in 2010 (date4j.net) - a small open source library to replace the poorly implemented date classes in the standard Java toolkit. (Date4j is used by one of the Data Acquisition Systems of the Large Hadron Collider at CERN.)In 2011, an example Java application he wrote was used by Oracle's Java Magazine as a starting point to demonstrate the migration of a Swing application to a JavaFX implementation.Released formula4j in 2013 (formula4j.com) - a library for parsing and evaluating mathematical expressions.Created specialrelativity.net in 2014 - a didactic tour of the basic ideas of special relativity.