Chapter 13.5, Problem 13.25CP

Explanation of Solution

ComboBox Controls:

• It is used to present a list of items in a drop-down list.
  • User may select an item from a given list of items.
• Create a “ComboBox” control using the “ComboBox” class.
  • It is present in the “javafx.scene.control” package.

Retrieving the selected item from a “ComboBox” control:

User can get the selected item in a “ComboBox” list using the method named “getValue()”.

• If no item is selected in this method, then the method will return “null”...