Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
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Textbook Question
Chapter 8.3, Problem 21STQ
In the following code, will the two invocations of writeOutput produce the same output on the screen or not?
(The relevant classes are defined in Listings 8.1, 8.2, and 8.4.)
Person person - new Student(“Sam“, 999);
person.writeOutput();
person - new Undergraduate (“Sam”, 999, 1);
person.writetOutput ();
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Description:
Create a class named ComparableDog that extends Animal and implements Comparable interface.
Implement the compareTo method to compare the Dogs on the basis of age.
Write a test class to find the bigger age of two instances of ComparableDog Objects, and complement the ComparableDog class with the missing part.
1) The test program, the ComparableDog class, and its super class Animal are given as follows.
// Main method
public static void main(String[] args) {
// Create two comparable Dogs
ComparableDog dog1 = new ComparableDog(3);
ComparableDog dog2 = new ComparableDog(4);
System.out.println("Dog1:" + dog1);
System.out.println("Dog2:" + dog2);
if(dog1.compareTo(dog2) == 1)
System.out.println("Dog1 is older than Dog2");
else if(dog1.compareTo(dog2) == -1)
System.out.println("Dog1 is younger than Dog2");
else
System.out.println("Dog1 and Dog2 have the same age");
}…
Instructions-Java
Assignment is to define a class named Address.
The Address class will have three private instance variables:
an int named street_number
a String named street_name
and a String named state.
Write three constructors for the Address class:
an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice,
a constructor that takes the street values as input but defaults the state to "Arizona",
and a constructor that takes all three pieces of information as input
Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses.
Run your code to make sure it works.
Next add the following public methods to the Address class and test them from main as you go:
Write getters and…
1. Implement a Student class. a. Create a class Student with the following private data members: 1. name 2. exam_1 grade 3. exam_2 grade b. Create all appropriate accessor and mutator functions. c. Assign appropriate access modifiers to insure encapsulation. d. Add a private calcGPA() function that calculates and returns the GPA based upon the two exam grades. e. Add a public getGrade() function that: 1. Obtains the GPA from the private calcGPA() function. 2. Returns a letter grade based upon the numerical GPA value. 90 to 100 = A 80 to 90 = B 70 to 80 = C 60 to 70 = D 0 to 60 = F f. Test all functions from main.
2. Using the class from problem 1, replace main with the following: a. Implement a partially filled array of type Student named students of capacity 10. b. Implement a non-member addStudent() function that: 1. Creates a new student with data populated by input parameters. 2. Adds the new student to the students array. c. Implement a non-member output() function that: 1.…
Chapter 8 Solutions
Java: An Introduction to Problem Solving and Programming (7th Edition)
Ch. 8.1 - Prob. 1STQCh. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Can a derived class directly access by name a...Ch. 8.1 - Can a derived class directly invoke a private...Ch. 8.1 - Prob. 6STQCh. 8.1 - Suppose s is an object of the class Student. Base...Ch. 8.2 - Give a complete definition of a class called...Ch. 8.2 - Add a constructor to the class Student that sets...Ch. 8.2 - Rewrite the definition of the method writeoutput...
Ch. 8.2 - Rewrite the definition of the method reset for the...Ch. 8.2 - Can an object be referenced by variables of...Ch. 8.2 - What is the type or types of the variable(s) that...Ch. 8.2 - Prob. 14STQCh. 8.2 - Prob. 15STQCh. 8.2 - Consider the code below, which was discussed in...Ch. 8.2 - Prob. 17STQCh. 8.3 - Prob. 18STQCh. 8.3 - Prob. 19STQCh. 8.3 - Is overloading a method name an example of...Ch. 8.3 - In the following code, will the two invocations of...Ch. 8.3 - In the following code, which definition of...Ch. 8.4 - Prob. 23STQCh. 8.4 - Prob. 24STQCh. 8.4 - Prob. 25STQCh. 8.4 - Prob. 26STQCh. 8.4 - Prob. 27STQCh. 8.4 - Prob. 28STQCh. 8.4 - Are the two definitions of the constructors given...Ch. 8.4 - The private method skipSpaces appears in the...Ch. 8.4 - Describe the implementation of the method drawHere...Ch. 8.4 - Is the following valid if ShapeBaSe is defined as...Ch. 8.4 - Prob. 33STQCh. 8.5 - Prob. 34STQCh. 8.5 - What is the difference between what you can do in...Ch. 8.5 - Prob. 36STQCh. 8 - Consider a program that will keep track of the...Ch. 8 - Implement your base class for the hierarchy from...Ch. 8 - Draw a hierarchy for the components you might find...Ch. 8 - Suppose we want to implement a drawing program...Ch. 8 - Create a class Square derived from DrawableShape,...Ch. 8 - Create a class SchoolKid that is the base class...Ch. 8 - Derive a class ExaggeratingKid from SchoolKid, as...Ch. 8 - Create an abstract class PayCalculator that has an...Ch. 8 - Derive a class RegularPay from PayCalculator, as...Ch. 8 - Create an abstract class DiscountPolicy. It should...Ch. 8 - Derive a class BulkDiscount from DiscountPolicy,...Ch. 8 - Derive a class BuyNItemsGetOneFree from...Ch. 8 - Prob. 13ECh. 8 - Prob. 14ECh. 8 - Create an interface MessageEncoder that has a...Ch. 8 - Create a class SubstitutionCipher that implements...Ch. 8 - Create a class ShuffleCipher that implements the...Ch. 8 - Define a class named Employee whose objects are...Ch. 8 - Define a class named Doctor whose objects are...Ch. 8 - Create a base class called Vehicle that has the...Ch. 8 - Create a new class called Dog that is derived from...Ch. 8 - Define a class called Diamond that is derived from...Ch. 8 - Prob. 2PPCh. 8 - Prob. 3PPCh. 8 - Prob. 4PPCh. 8 - Create an interface MessageDecoder that has a...Ch. 8 - For this Programming Project, start with...Ch. 8 - Modify the Student class in Listing 8.2 so that it...Ch. 8 - Prob. 8PPCh. 8 - Prob. 9PPCh. 8 - Prob. 10PP
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