Starting Out with Java: Early Objects (6th Edition)

6th Edition

ISBN: 9780134462011

Author: Tony Gaddis

Publisher: PEARSON

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Textbook Question

Chapter 3, Problem 9PC

Circle Class

Write a Circle class that has the following fields:

radius: a double
PI: a final double initialized with the value 3.14159

The class should have the following methods:

Constructor. Accepts the radius of the circle as an argument.
Constructor. A no-arg constructor that sets the radi us field to 0.0.
setRadius. A mutator method for the radius field.
GetRadius. An accessor method for the radius field.
area. Returns the area of the circle, which is calculated as
area = PI * radius * radius
diameter. Returns the diameter of the circle, which is calculated as
diameter = radius * 2
circumference. Returns the circumference of the circle, which is calculated as
circumference = 2 * PI * radius

Write a program that demonstrates the Circle class by asking the user for the circle’s radius, creating a Circle object, and then reporting the circle’s area, diameter, and circumference.

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Chapter 3, Problem 8PC

Chapter 3, Problem 10PC

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Chapter 3 Solutions

Starting Out with Java: Early Objects (6th Edition)

Ch. 3.1 - In this chapter, we use the metaphor of a...Ch. 3.1 - Prob. 3.2CP Ch. 3.1 - When a variable is said to reference an object,...Ch. 3.1 - A string literal, such as Joe, causes what type of...Ch. 3.1 - Prob. 3.5CP Ch. 3.1 - Prob. 3.6CP Ch. 3.1 - Prob. 3.7CP Ch. 3.1 - Prob. 3.8CP Ch. 3.1 - Prob. 3.9CP Ch. 3.1 - What is a stale data item?

Ch. 3.3 - Assume that r1 and r2 are variables that reference...Ch. 3.4 - How is a constructor named?Ch. 3.4 - What is a constructors return type?Ch. 3.4 - Prob. 3.14CP Ch. 3.8 - Prob. 3.15CP Ch. 3.8 - When designing an object-oriented application, who...Ch. 3.8 - How do you identify the potential classes in a...Ch. 3.8 - What are a classs responsibilities?Ch. 3.8 - What two questions should you ask to determine a...Ch. 3.8 - Will all of a classs actions always be directly...Ch. 3 - This is a collection of programming statements...Ch. 3 - A class is analogous to a(n) _______. a. house b....Ch. 3 - An object is a(n) _____. a. blueprint b. attribute...Ch. 3 - This is a class member that holds data. a. method...Ch. 3 - This key word causes an object to be created in...Ch. 3 - This key word causes a value to be sent back from...Ch. 3 - This is a method that gets a value from a classs...Ch. 3 - This is a method that stores a value in a field or...Ch. 3 - When the value of an item is dependent on other...Ch. 3 - This is a method that is automatically called when...Ch. 3 - When a local variable has the same name as a...Ch. 3 - If you do not write a constructor for a class,...Ch. 3 - A classs responsibilities are __________. a. the...Ch. 3 - Prob. 14TF Ch. 3 - True or False: When passing an argument to a...Ch. 3 - Prob. 16TF Ch. 3 - True or False: Each instance of a class has its...Ch. 3 - True or False: When you write a constructor for a...Ch. 3 - True or False: To find the classes needed for an...Ch. 3 - Find the error in the following class: public...Ch. 3 - Prob. 2FTE Ch. 3 - The following statement attempts to create a...Ch. 3 - Design a class named Pet, which should have the...Ch. 3 - Look at the following partial class definition,...Ch. 3 - Look at the following description of a problem...Ch. 3 - What is the difference between a class and an...Ch. 3 - A contractor uses a blueprint to build a set of...Ch. 3 - What is an accessor method? What is a mutator...Ch. 3 - is it a good idea to make fields private? Why or...Ch. 3 - If a class has a private field, what has access to...Ch. 3 - Prob. 6SA Ch. 3 - Assume a program named MailList.java is stored in...Ch. 3 - Prob. 8SA Ch. 3 - Why are constructors useful for performing...Ch. 3 - Prob. 10SA Ch. 3 - What is the difference between an argument and a...Ch. 3 - Under what circumstances does Java automatically...Ch. 3 - What do you call a constructor that accepts no...Ch. 3 - Employee Class Write a class named Employee that...Ch. 3 - Car Class Write a class named Car that has the...Ch. 3 - Personal Information Class Design a class that...Ch. 3 - Temperature Class Write a Temperature class that...Ch. 3 - Retail Item Class Write a class named RetailItem...Ch. 3 - Payroll Class Design a Payroll class that has...Ch. 3 - TestScores Class Design a TestScores class that...Ch. 3 - Circle Class Write a Circle class that has the...Ch. 3 - Pet Class Design a class named Pet, which should...Ch. 3 - Patient Charges Write a class named Patient that...

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