I am glad to announce about “Java SE Core Web Services” new course available for free at www.abelski.com. The Extensible Markup Language (XML), a subset of SGML, was originally formed to enable generic SGML to be served, received and processed on the web (as HTML). XML is the natural choice for B2B connectivity. This course focuses on Java SE core web services introducing Java API for XML based web services (JAX-WS) and Java Architecture for XML Binding (JAXB) together with real world examples.
The Visitor Design Pattern
The visitor design pattern allows us to add operations to objects that already exist without modifying their classes and without extending them.