Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134462011
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 6.9, Problem 6.14CP
A class has a reference variable as an instance field. Is it advisable to use the reference variable to call a method prior to assigning it the address of an object? Why or why not?
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is a construct that defines objects of the same type.
A class
An object
A method
A data field
Design a LandTract class that has two fields (i.e. instance variables): one for the tract’s length(a double), and one for the width (a double). The class should have:
a constructor that accepts arguments for the two fields
a method that returns the tract’s area(i.e. length * width)
an equals method that accepts a LandTract object as an argument. If the argument object
holds the same data (i.e. length and width) as the calling object, this method should return
true. Otherwise, it should return false.
a toString method (that returns a String representation of the tract’s length, width, and
area).
Demonstrate the class in a program by creating an array of three LandTract objects initialized with user input. Then, print the info of the LandTract objects stored in the array by invoking the toString method (implicitly or explicity). Also, use the equals method to compare at least two LandTract objects and print wether they are of equal size or not.
Sample Output:…
A class type cast can be used to force an object reference to be converted
into another object reference of a class type which is not the original type,
or a subclass, of the object reference being type-casted. *
True
False
Chapter 6 Solutions
Starting Out with Java: Early Objects (6th Edition)
Ch. 6.1 - Prob. 6.1CPCh. 6.1 - Prob. 6.2CPCh. 6.1 - Describe the limitation of static methods.Ch. 6.3 - Prob. 6.4CPCh. 6.3 - What is a methods signature?Ch. 6.3 - Prob. 6.6CPCh. 6.3 - How many default constructors may a class have?Ch. 6.4 - Prob. 6.8CPCh. 6.4 - Prob. 6.9CPCh. 6.4 - Prob. 6.10CP
Ch. 6.5 - Recall the Rectangle class shown earlier in this...Ch. 6.9 - Consider the following statement: A car has an...Ch. 6.9 - Why is it not safe to return a reference to an...Ch. 6.9 - A class has a reference variable as an instance...Ch. 6.10 - Prob. 6.15CPCh. 6.12 - Look at the following statement, which declares an...Ch. 6.12 - Assume that the following enumerated data type has...Ch. 6.12 - Prob. 6.18CPCh. 6 - This type of method cannot access any non-static...Ch. 6 - Prob. 2MCCh. 6 - Prob. 3MCCh. 6 - Prob. 4MCCh. 6 - If you write this method for a class, Java will...Ch. 6 - Making an instance of one class a field in another...Ch. 6 - This is the name of a reference variable that is...Ch. 6 - This enum method returns the position of an enum...Ch. 6 - Assuming the following declaration exists: enum...Ch. 6 - You cannot use the fully qualified name of an enum...Ch. 6 - The Java Virtual Machine periodically performs...Ch. 6 - If a class has this method, it is called...Ch. 6 - CRC stands for a. Class, Return value, Composition...Ch. 6 - Prob. 11MCCh. 6 - True or False: A static member method may refer to...Ch. 6 - True or False: All static member variables are...Ch. 6 - Prob. 18TFCh. 6 - Prob. 19TFCh. 6 - Prob. 21TFCh. 6 - True or False: Enumerated data types are actually...Ch. 6 - True or False: enum constants have a toString...Ch. 6 - True or False: A class may not have more than one...Ch. 6 - True or False: A private class that is defined...Ch. 6 - public class MyClass { private int x; private...Ch. 6 - public class TwoValues { private int x, y; public...Ch. 6 - public class MyMath { public static int square(int...Ch. 6 - Assume the following declaration exists : enum...Ch. 6 - l. Consider the following class declaration:...Ch. 6 - A pet store sells dogs, cats, birds, and hamsters....Ch. 6 - Prob. 1SACh. 6 - Prob. 2SACh. 6 - Consider the following class declaration: public...Ch. 6 - Prob. 4SACh. 6 - How does method overloading improve the usefulness...Ch. 6 - Prob. 6SACh. 6 - Even if you do not write an equals method for a...Ch. 6 - A has a relationship can exist between classes....Ch. 6 - Prob. 9SACh. 6 - Is it advisable or not advisable to write a method...Ch. 6 - Prob. 11SACh. 6 - Look at the following declaration: enum Color {...Ch. 6 - Assuming the following enum declaration exists:...Ch. 6 - Under what circumstances does an object become a...Ch. 6 - Area Class Write a class that has three overloaded...Ch. 6 - InventoryItem Class Copy Constructor Add a copy...Ch. 6 - Carpet Calculator The Westfield Carpet Company has...Ch. 6 - LandTract Class Make a LandTract class that has...Ch. 6 - Month Class Write a class named Month. The class...Ch. 6 - Employee Class Modification In Programming...Ch. 6 - RetailItem Class Modification Modify this chapters...Ch. 6 - Sales Receipt File Modify the program you wrote in...Ch. 6 - Parking Ticket Simulator For this assignment you...Ch. 6 - Geometry Calculator Design a Geometry class with...Ch. 6 - Car Instrument Simulator For this assignment, you...Ch. 6 - First to One Game This game is meant for two or...Ch. 6 - Heads or TaiLs Game This game is meant for two or...
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