Supporting Methods and Events by An Integrated Abstraction

Events have been introduced into a number of programming languages since they are known as a useful programming ab-straction. Although those languages provide a language con-struct directly supporting events, they also provide a sim-ilar construct in parallel, which is a method. This paper proposes a new language construct named method slot and a new language DominoJ, which is a Java-based extension supporting method slots. A method slot is a single lan-guage construct supporting both methods and events by an integrated abstraction. This paper shows how method slots work as methods and events. 1