Page 539 - Introduction to Programming with Java: A Problem Solving Approach

The doIt(); call is an attempt to call the superclass’s version of doIt.
a) Describe the problem that occurs when another method calls the above doIt method and the doIt method executes.
b) How should you fix the problem?
9. [after §12.8] What does it mean when you use the final modifier for a method?
10. [after §12.8] What does it mean when you use the final modifier for a class?
11. [after §12.9] Fill in the blanks:
If thing A “has a” thing B and “has a” thing C, there is a(n) association, and A’s class definition will contain declarations for variables. If A “is a” special form of B, there is
a(n) association, and the right side of A’s class heading will contain the words .
12. [after §12.9] Identification of type of association:
Given the following list of word pairs, for each word pair, identify the association between the two words. More specifically, identify whether the two words are related by composition or inheritance. To get you started, we’ve provided the answers to the first two word pairs. Bicycle and front wheel are related by composition because a bicycle “has a” front wheel. Bicycle and mountain bike are related by inheritance because a mountain bike “is a” bicycle.
Exercises 505
inheritance or composition?
composition inheritance
Apago PDF Enhancer
fixed assets salesperson tree
robin method paranoia
bicycle
bicycle
structural member building
company employee
forest
bird
class
neurosis
front wheel
mountain bike
beam
floor
13. [after §12.10] Shuffling:
Suppose you are developing the Card Game program suggested by Figure 12.17 in the text. The following
partial UML class diagram shows where you are in the developmental process:
1*
GroupOfCards
-cards : Card[] -currentSize : int=0
+GroupOfCards(num : int) +getCurrentSize() : int +addCard(card : Card) : void +removeCard(index : int) : Card +display() : void
Card
-num : int -suit : int
+Card(num : int, suit : int) +display() : void
DeckDriver
+main(args : String[]) : void
Deck
+TOTAL_CARDS : int=52
+Deck() +shuffle() : void