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computer science
java software solutions
Java Software Solutions 9th Edition John Lewis, William Loftus - Solutions
PP 13.8 Design and implement a program that prompts the user to enter a string and then performs two palindrome tests. The first should use a single stack to test whether the string is a palindrome. The second should use two stacks to test whether the string is a palindrome when capitalization,
PP 13.9 Design and implement a class named stringTree, a binary tree for storing string objects in alphabetic order. Each node in the tree should be represented by a Node class, which stores the string value and pointers to the right and left child nodes. For any node value in the tree, the value
SR 9.1 Describe the relationship between a parent class and a child class.
SR 9.2 How does inheritance support software reuse?
SR 9.3 What relationship should every class derivation represent?
SR 9.4 What does the protected modifier accomplish?
SR 9.5 Why is the super reference important to a child class?
SR 9.6 Define a class schoolBook2 that extends Book2 to include an attribute indicating the age (4 through 16) that a book targets. The constructor accepts the age as a parameter. The class also provides a level method that returns a string as follows: "Pre-school" if the target age is 4 through 6,
SR 9.7 What is the difference between single inheritance and multiple inheritance?
SR 9.8 Why would a child class override one or more of the methods of its parent class?
SR 9.9 True or False? Explain. a. A child class may define a method with the same name as a method in the parent class. b. A child class can override the constructor of the parent class. c. A child class can override a final method of the parent class. d. It is considered poor design when a child
SR 9.10 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of food. Show some appropriate variables and method names for at least two of these classes.
SR 9.11 What is the significance of the object class?
SR 9.12 Which is the only Java class that does not have a parent class? Explain.
SR 9.13 What is the role of an abstract class?
SR 9.14 Why is it a contradiction to define a final, abstract class?
SR 9.15 What is an interface hierarchy?
SR 9.16 Are all members of a parent class inherited by the child? Explain.
SR 9.17 Could the Pizza class refer to the variable servings explicitly? What about the calories method? Explain.
SR 9.18 What does it mean for an inheritance derivation to represent an is-a relationship?
SR 9.19 Where should common features of classes appear in a class hierarchy? Why?
SR 9.20 How can you define a class with multiple roles?
SR 9.21 Why should you override the tostring method of a parent in its child class, even when the method is not invoked through the child by your current applications?
SR 9.22 How can the final modifier be used to restrict inheritance? Why would you do this?
SR 9.23 What is the purpose of the shape class?
SR 9.24 Describe the inheritance relationship between a Node and an Ellipse.
SR 9.25 Describe the inheritance relationship between a Node and a Label.
SR 9.26 Which nodes can serve as root nodes of a scene?
SR 9.27 What are some ways a color picker allows the user to specify a color?
SR 9.28 What does the getvalue method of a DatePicker object return? What does the getvalue method of a ColorPicker object return?
SR 9.29 What is a dialog box?
SR 9.30 What classes can be used to create and display dialog boxes?
SR 9.31 What is a file chooser?
EX 9.1 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of clocks. Show the variables and method names for two of these classes.
EX 9.2 Show an alternative diagram for the hierarchy in Exercise 9.1. Explain why it may be a better or worse approach than the original.
EX 9.3 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of cars, organized first by manufacturer. Show some appropriate variables and method names for at least two of these classes.
EX 9.4 Show an alternative diagram for the hierarchy in Exercise 9.3 in which the cars are organized first by type (sports car, sedan, SUV, etc.). Show some appropriate variables and method names for at least two of these classes. Compare and contrast the two approaches.
EX 9.5 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of airplanes. Show some appropriate variables and method names for at least two of these classes.
EX 9.6 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of trees (oak, elm, etc.). Show some appropriate variables and method names for at least two of these classes.
EX 9.7 Draw a UML class diagram showing an inheritance hierarchy containing classes that represent different types of payment transactions at a store (cash, credit card, etc.). Show some appropriate variables and method names for at least two of these classes.
EX 9.8 Experiment with a simple derivation relationship between two classes. Put println statements in constructors of both the parent and child classes. Do not explicitly call the constructor of the parent in the child. What happens? Why? Change the child's constructor to explicitly call the
EX 9.9 Which of the following classes can be used as the root node of a scene in a JavaFX application? What is the determining factor? a. GridPane b. Rectangle C. Group d. Button e. ImageView
EX 9.10 Describe the role of the Alert class.
PP 9.1 Write a class called MonetaryCoin that is derived from the coin class presented in Chapter 5. Store an integer in the MonetaryCoin that represents its value and add a method that returns its value. Create a main driver class to instantiate and compute the sum of several MonetaryCoin objects.
PP 9.2 Design and implement a set of classes that define the employees of a hospital: doctor, nurse, administrator, surgeon, receptionist, janitor, and so on. Include methods in each class that are named according to the services provided by that person and that print an appropriate message. Create
PP 9.3 Design and implement a set of classes that define various types of reading material: books, novels, magazines, technical journals, textbooks, and so on. Include data values that describe various attributes of the material, such as the number of pages and the names of the primary characters.
PP 9.4 Design and implement a set of classes that keeps track of various sports statistics. Have each low-level class represent
PP 9.5 Design and implement a set of classes that keeps track of demographic information about a set of people, such as age, nationality, occupation, income, and so on. Design each class to focus on a particular aspect of data collection. Create a main driver class to instantiate and exercise
PP 9.6 Design and implement a set of classes that define a series of three-dimensional geometric shapes (these are not like JavaFX classes and have no graphic representation). For each, store fundamental data about their size and provide methods to access and modify this data. In addition, provide
PP 9.7 Design and implement a set of classes that define various types of electronics equipment (computers, cell phones, pagers, digital cameras, etc.). Include data values that describe various attributes of the electronics, such as the weight, cost, power usage, and the names of the
PP 9.8 Design and implement a set of classes that define various courses in your curriculum. Include information about each course such as the title, number, description, and department that teaches the course. Consider the categories of classes that constitutes your curriculum when designing your
PP 9.9 Write a JavaFX application that displays a text field, a color picker, and a button. When the user presses the button, or presses return while in the text field, display the text obtained. from the text field in the color selected by the color picker. PP 9.10 Modify the RubberLines program
PP 9.10 Modify the RubberLines program from Chapter 7 so that a color picker is displayed in the upper left corner of the window. Let the value of the color picker determine the color of the next line drawn.
PP 9.11 Write a JavaFX application that allows the user to draw (scribble) on the scene by dragging the mouse. In the upper-left corner, provide a button to clear the scene and a color picker to choose the current drawing color. Hint: Add a new polyline to the scene each time the mouse button is
PP 10.1 Modify the Firm example from this chapter such that it accomplishes its polymorphism using an interface called Payable.
PP 10.2 Modify the Firm example from this chapter such that all employees can be given different vacation options depending on their classification. Provide a method called vacation that returns the number of vacation days a person has. Give all employees a standard number of vacation days (14),
PP 10.3 Implement the speaker interface described in Section 10.3, and create three classes that implement speaker in
PP 10.4 Rewrite the sorting class so that both sorting algorithms put the values in descending order. Create a driver class with a main method to exercise the modifications.
PP 10.5 Modify the Movies program from Chapter 8 so that it keeps the DVDs sorted by title.
PP 10.6 Create a new version of the Ellipse Sliders program from this chapter that uses change listeners instead of property binding to achieve the same functionality.
PP 10.7 Create a new version of the spinner Demo program from this chapter that uses change listeners instead of property binding to achieve the same functionality.
PP 10.8 Write a JavaFX application that displays a Text object and a slider that controls the font size of the text.
PP 10.9 Create a new version of the QuoteOptions program from Chapter 5 that uses a spinner to pick the quote category rather than a set of radio buttons.
EX 10.1 Draw and annotate a class hierarchy that represents various types of faculty at a university. Show what characteristics would be represented in the various classes of the hierarchy. Explain how polymorphism could play a role in the process of assigning courses to each faculty member.
EX 10.2 Draw and annotate a class hierarchy that represents various types of animals in a zoo. Show what characteristics would be represented in the various classes of the hierarchy. Explain how polymorphism could play a role in guiding the feeding of the animals.
EX 10.3 Draw and annotate a class hierarchy that represents various types of sales transactions in a store (cash, credit, etc.). Show what characteristics would be represented in the various classes of the hierarchy. Explain how polymorphism could play a role in the payment process.
EX 10.4 What would happen if the pay method were not defined as an abstract method in the Staff Member class of the Firm program?
EX 10.5 Describe a property binding that you could set up other than the examples used in this chapter.
EX 10.6 Write a statement that would bind the property representing the radius of a circle object to the property representing the value in a slider.
SR 10.1 What is polymorphism?
SR 10.2 Why is compile time binding considered more efficient than dynamic binding?
SR 10.3 How does inheritance support polymorphism?
SR 10.4 Suppose the class Music Player is the parent of the class CDPlayer. Is the following sequence of statements allowed in Java? Explain. Music Player mplayer new MusicPlayer(); CDPlayer caplayer = new CDPlayer(); mplayer = cdplayer;
SR 10.5 Suppose the class Music Player is the parent of the class CDPlayer. Is the following sequence of statements allowed in Java? Explain. Music Player mplayer = new MusicPlayer(); CDPlayer cdplayer = new CDPlayer(); cdplayer mplayer;
SR 10.6 How is overriding related to polymorphism?
SR 10.7 Why is the Staff Member class in the Firm example declared as abstract?
SR 10.8 Why is the pay method declared in the staff Member class, given that it is abstract and has no body at that level?
SR 10.9 Which pay method is invoked by the following line from the payday method of the staff class? amount = staffList [count].pay();
SR 10.10 How can polymorphism be accomplished using interfaces?
SR 10.11 Suppose that the speaker interface and the Philosopher and Dog classes are as described in this section. Are the following sequences of statements allowed in Java? Explain. a. Speaker current = new Speaker(); b. Speaker current = new Dog (); C. Speaker first, second; first new Dog ();
SR 10.12 Describe the comparable interface.
SR 10.13 Show the sequence of changes the selection sort algorithm makes to the following list of numbers: 57 18 243
SR 10.14 Show the sequence of changes the insertion sort algorithm makes to the following list of numbers: 57 18 243
SR 10.15 In what way are the sort methods defined in this chapter polymorphic?
SR 10.16 Which is better: selection sort or insertion sort? Explain.
SR 10.17 Given the following list of numbers, how many elements of the list would be examined by the linear search algorithm to determine if each of the indicated target elements are on the list? 15 21 4 17 8 27 1 22 43 57 25 7 53 12 16 a. 17 b. 15 C. 16 d. 45
SR 10.18 Describe the general concept of a binary search.
SR 10.19 Given the following list of numbers, how many elements of the list would be examined by the binary search algorithm to determine if each of the indicated target elements are on the list? 14 7 8 12 15 16 17 21 22 25 27 43 53 57
SR 10.20 Suppose you are designing classes for a banking- related system. Both checking accounts and savings accounts require deposit and withdraw operations. You decide to provide these behaviors using polymorphism. Which polymorphic mechanism (inheritance or interfaces) is best suited for this
SR 10.21 Suppose you are designing classes to help create aquarium-based screen savers. At times, you will want some aquarium objects to "float" from wherever they are to the top of
SR 10.22 Suppose you are designing classes to support the modeling of rain forest environments. Animal objects, such as butterflies and monkeys, need to grow older periodically. You decide to provide this behavior using polymorphism. Which polymorphic mechanism (inheritance or interfaces) is best
SR 10.23 What is a JavaFX property?
SR 10.24 What is the result of property binding?
SR 10.25 How do you perform mathematical operations on numeric properties?
SR 10.26 What is a change listener?
SR 10.27 What does a slider allow the user to do?
SR 10.28 How do you access the value that a slider represents?
SR 10.29 How does the user interact with a spinner?
SR 10.30 Why might a program designer opt to use a spinner rather than a choice box?
SR 10.31 What is a spinner value factory?
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