Consider the classes Student and CollegeStudent, as described in Exercise 9, and the following methods:

a. What are the static and dynamic types of s, cs, and aStudent when the code is executed?

b. If we change the data type of the parameter aStudent from Student to CollegeStudent, will the main method execute correctly? If so, explain why; if not, explain why not and correct the method.

Exercise 9

Consider the following outline of a class Student:

Now consider the following outline of a class CollegeStudent:

a. Does the method setStudent in CollegeStudent overload or override the method setStudent in the class Student? Explain.

b. The class CollegeStudent does not define methods that get the student’s name and identification number. Why?

c. Define the constructors for CollegeStudent. Can you omit a call to super in the default constructor? Can you omit it in the second constructor? Give reasons for your answers.

d. Define the method setStudent for CollegeStudent

e. Can the method setStudent for CollegeStudent contain the following statement?

name = studentName;

Explain.

f. If joe is an object of the class CollegeStudent, write Java statements that display joe’s name.

g. If the method toString in Student returns a string containing the student’s name and identification number, and toString in CollegeStudent returns a string containing the student’s name, identification number, year, and degree, can CollegeStudent’s toString call Student’s toString? If so, what statement will make this call? If not, why not?