A realization is a relationship between a class or component and an interface.
A realization can be created in the following diagrams:
In a realization, the class implements the methods specified in the interface. The interface is called the specification element and the class is called the implementation element.You can also create a realization between a shortcut of an interface and a class. Whenever the link is oriented, only the parent object can be the shortcut.
The arrowhead at one end of the realization always points towards the interface.