Chapter 3:  "Classes"

Data Structures with Java, Rick Mercer

Answers to Self-Check Questions

3-1 make the assertions pass - answers in order
    1
    4
    3
    5

3-2 make the assertions pass - answers in order
    6
   -1
    6
    2
    
3-3 type: LibraryBook

3-4 methods: borrowBook, returnBook, getBorrower
    and you could say LibraryBook which is a special method also known as a constructor

3-5 String

3-6 nothing, it is a void return type. 

3-7 String

3-8 two (both String)

3-9 LibraryBook pp = new LibraryBook("Program Design and Development", "Rick Mercer");

3-10 pp.borrowBook("Anna");

3-11 pp.getBorrower();

3-12 both a and b pass
	

3-13 public String getTitle(){
         return title;
     } 

	
3-14 getTitle - answers listed in order
     "C++"
     "Java"

	
3-15 NOTE: assuming code meant false if a book IS borrowed

  public boolean isAvailable(LibraryBood book){
  	return borrower == null;
  }


3-16 getTitle assertions - answers listed in order

     true
     true
     false
     false

	
3-17 public String toString(){
         return "" + ID + " " + balance;
     }


3-18 Answer not supplied since a hand-written answer is required homework 
     due Friday 7-Sep at 10:00 am in our lecture hall