Create a class Student and another class Instructor. $[$Details are unimportant at this stage, and yes, this will be very poor $O-O$ design!$].$ Let each class have a single instance variable name that contains a full name. Class Student is shown at right. $[$Remember to use Eclipse "source" shortcuts to create these classes very quickly!$]$

Suppose we want to require a behavior that displays a "role" as part of the name. For example:

Student

$-$name:String $//$full name

$+$Student$($String $n)$

$+$getName$()$: String

toString$()$:String

Stephen Weissman, instructor

Susan Holly, student

Create an interface RoleDisplayable to require a void method displayNameAndRole$()$

a$.$ Code a default method for displayNameAndRole$()$ that makes all Student instances display the name with $",$ Student" after the name.

b$.$ Important: if it's not a Student, let's make the default method do nothing. $[$Maybe not great design, but it will make this lab more interesting!$]$ How will you do this??

c$.$ Also important: if you try to invoke getName$()$ from your default method, you'll get a compile error! $[$Remember static and dynamic types? getName$()$ is in the dynamic type Student!$]$ To solve this problem, we'll need to add a cast before the dot and method call something like this: $(($Student$)$ this$)$

Make class Student implement RoleDisplayable.

Write a test driver $($in main$())$ that

a$.$ builds an ArrayList of