Running your first JSF 2.3 code 

Jakarta Server Faces (JSF) is the Java technology made to simplify the process of building UIs.

With JSF, you can build components and use (or reuse) them in the UI in an extensible way. You can also use other powerful APIs, such as Jakarta CDI and Jakarta Bean Validation, to improve your application and its architecture.

In this recipe, we will use the Validator and Converter interfaces with the new feature introduced by version 2.3, which is the possibility of using them with generic parameters.