Object oriented programming and development in JxLogo

JxLogo is an undergraduate student project that develops a complete Logo programming environment in Java. It includes an object oriented extension based on declarative structures similar to those used in common general purpose programming languages. The paper describes some details of the OO component of the language. It illustrates the effectiveness of the proposal describing the realization of an elementary geometric library. Some remarks on how following a straightforward progression to learn OO programming are also presented. In-line compiling of JxLogo classes and procedures into Java bytecode is a specific characteristic that is emphasized in the paper.