(Click to see larger image) These two screenshots show a simple prototype of a conference management system created in one afternoon by a group of Java developers at OT2002. The upper diagram shows a ...

An object in UML maps directly to an object in Java. However, when developers create Java applications, they're creating Java classes, not Java objects.

Package Packages (Figure B) are general-purpose grouping mechanisms. A package in UML translates directly into a package in Java. In Java, a package can contain other packages, classes, or both.