It’s appropriate to use an anonymous inner class if you are going to use the class only on...

It’s appropriate to use an anonymous inner class if you are going to use the class only once. In the Factorial program in Figures, we use the

listener

object twice, so that

listener

object needed to have a name. However, we used that object’s class only once, to instantiate that one object. Therefore, that object’s class did not need to have a name, and we could have used an anonymous class to create our

listener

object. For this exercise, modify the Factorial program to use an anonymous

ActionListener

class instead of the named

Listener

class. [Hint: The program is already set up to facilitate this change—it’s mostly cut-and-paste.]

Figure FactorialButton program–part A

Figure FactorialButton program–part B