Using Java, write a class HighSchoolStudent with the UML below. It extends the class Student. Answer questions 1 and 2, comment out the one that does not work and comment the error message it generated.

#1. If HighSchoolStudent is a subclass of Student, can you assign an object of HighSchoolStudent to a variable of type Student? Why or why not?

#2. Can you assign an object of Student to a variable of type HighSchoolStudent? Why or why not?

HighSchoolStudent

-grade : int // 9,10,11,12

+HighSchoolStudent() +HighSchoolStudent( Name, String, int )

+toString() : String

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/** A class that represents a person's name. Listing B-1 in Segment B.16 of Appendix B. @author Frank M. Carrano @author Timothy M. Henry @version 5.0 */ public class Name //implements Comparable { private String first; // First name private String last; // Last name public Name() { } // end default constructor public Name(String firstName, String lastName) { first = firstName; last = lastName; } // end constructor public void setName(String firstName, String lastName) { setFirst(firstName); setLast(lastName); } // end setName public String getName() { return toString(); } // end getName public void setFirst(String firstName) { first = firstName; } // end setFirst public String getFirst() { return first; } // end getFirst public void setLast(String lastName) { last = lastName; } // end setLast public String getLast() { return last; } // end getLast public void giveLastNameTo(Name aName) { aName.setLast(last); } // end giveLastNameTo public String toString() { return first + " " + last; } // end toString public int compareTo( Name name2 ) { return last.compareTo( name2.getLast() ); } public static void main( String[] args ) { Name n0 = new Name( "John", "Doe" ); Name n1 = new Name( "Jane.", "Doe" ); System.out.println( n0.compareTo( n1 ) ); } } // end Name

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/** A class that represents a student. @author Frank M. Carrano @author Timothy M. Henry @version 5.0 */ public class Student { private Name fullName; private String id; // Identification number public Student() { fullName = new Name(); id = ""; } // end default constructor public Student(Name studentName, String studentId) { fullName = studentName; id = studentId; } // end constructor public void setStudent(Name studentName, String studentId) { setName(studentName); // Or fullName = studentName; setId(studentId); // Or id = studentId; } // end setStudent public void setName(Name studentName) { fullName = studentName; } // end setName public Name getName() { return fullName; } // end getName public void setId(String studentId) { id = studentId; } // end setId public String getId() { return id; } // end getId public String toString() { return id + " " + fullName.toString(); } // end toString } // end Student

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