Make the refactoring of app code to introduce Command pattern in the view layer (view package). In Main class of view layer there is a switch statemente that selects a command and call a ControlFacade method. Replace this structure with a call to the appropriate command using command design pattern. Implement the Command pattern in the view.commands package and call it from Main class.

For practice verification, run the tests.

mvn test

Check the console messages of the tests to improve your Command. If all tests are passing, your implementation is correct.

The minimum Java JDK version for testing is 11.