Java Uml Inheritance. The form of inheritance represented by the implements keyword in java is inheritance of interface only. The extends keyword in java declares inheritance of both interface and implementation.
Figure 1 uml generalization relationships the equivalent of java extends. The additional sale class helps illustrate the difference between the type of arrowhead used in the uml generalization relationships and those used in directed uml association relationships. The extends keyword in java declares inheritance of both interface and implementation.
Uml has an equivalent generalization relationship that is drawn as a solid line with a closed arrowhead from the subclass to the superclass.
It uses the uml notation to show a graphical representation of existing java code that is as accurate and up to date as your text editor while being very easy to use. The extends keyword in java declares inheritance of both interface and implementation. In uml the relationship between a class implementing an interface and the interface definition is called a realization relationship and it is drawn as a dashed line with a closed arrowhead from the implementing class to the interface. This type of inheritance is sometimes called sub typing.
