Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134457963
Author: GADDIS
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 9, Problem 6PC
Analyzable Interface
Modify the CourseGrades class you created in
public interface Analyzable
{
double getAverage();
GradedActivity getHighest();
GradedActivity getLowestf();
}
The getAverage method should return the average of the numeric scores stored in the grades array. The getHighest method should return a reference to the element of the grades array that has the highest numeric score. The getLowest method should return a reference to the element of the grades array that has the lowest numeric score. Demonstrate the new methods in a complete program.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Java programing
ShipsStudy the UML diagram carefully. The green spots signify public. The red squares signify private. Superclass Ship is abstract because it contains the abstract method purpose. This class also implements the Comparable interface to compare ships by tonnage. Ship also has a public static integer named numShips that is incremented in the constructor to serve as a counter for the number of ships.After coding these classes, write a program named TestShips that uses them as follows:⦁ Create an array of declared type Ship that contains at least six ships (two of each concrete subclass). You can make up all of the values for the data members of each ship.⦁ The Strings returned by purpose() can be determined by viewing the Possible Output below.⦁ Process the array in an enhanced for loop to display for each ship:⦁ The actual type using the getClass() method inherited from class Object.⦁ The output of the toString() method.⦁ The value returned by the purpose()…
Use of an InterfaceThe interface declares a method called salesSummary();
Use of an abstract classa.
A constructor that initializesint rowSumint colSumb. Implements the salesSummary(). The salesSummary() method will declare twoarrays as follows:o a multidimensional array named artistSales using below information:o a one-dimensional array named artistNames using below information:c. The salesSummary() method should calculate the total of each column in the artistSales arrayand display a combined (artistSales and artistNames) table with the names andsales as shown in Table 1.
Use of a subclassa. A constructor that initializesint indexb. Override the abstract constructorc. Override the salesSummary() method from the abstract classd. Overload the salesSummary(int artistPosition):This method will allow the user to search for a specific artist and display thebelow information:Artist NameArtist CD saleArtist DVD SaleArtist Blue Rale SaleArtist total of CD, DVD, and Blue Rale Sale .e. The…
Create a class Term. This class represents a term ofa polynomial such as 2x4 where 2 is coefficient and 4 isexponent of the term.Data members:- int coefficient int exponentCreate another class Polynomial. The internalrepresentation of a polynomial is an array of Terms. Thesize of this array should be fixed.Provide a constructor for this class that will set all termsof a polynomial object as zero (where coefficient is 0 andexponent is 0). Provide followingfunctions: setTerm(int, int) – Setting a term of a polynomialobject. Each successive call of this function shouldset next term of the polynomial object.It should do the following validations:- Whether the exponent of the term being set isalready used. Whether the array size limit is exceeded. Whether the exponent is negative.In all the cases it should not set the term and display anappropriate message. sort() – to arrange the terms in ascending order ofexponents. provide a function to print a polynomial object
Chapter 9 Solutions
Starting Out with Java: Early Objects (6th Edition)
Ch. 9.1 - Here is the first line of a class declaration....Ch. 9.1 - Look at the following class declarations and...Ch. 9.1 - Class B extends class A. (Class A is the...Ch. 9.2 - Prob. 9.4CPCh. 9.2 - Look at the following classes: public class Ground...Ch. 9.3 - Under what circumstances would a subclass need to...Ch. 9.3 - How can a subclass method call an overridden...Ch. 9.3 - If a method in a subclass has the same signature...Ch. 9.3 - If a method in a subclass has the same name as a...Ch. 9.3 - Prob. 9.10CP
Ch. 9.4 - When a class member is declared as protected, what...Ch. 9.4 - What is the difference between private members and...Ch. 9.4 - Why should you avoid making class members...Ch. 9.4 - Prob. 9.14CPCh. 9.4 - Why is it easy to give package access to a class...Ch. 9.6 - Look at the following class definition: public...Ch. 9.6 - When you create a class, it automatically has a...Ch. 9.7 - Recall the Rectangle and Cube classes discussed...Ch. 9.8 - Prob. 9.19CPCh. 9.8 - If a subclass extends a superclass with an...Ch. 9.8 - What is the purpose of an abstract class?Ch. 9.8 - If a class is defined as abstract, what can you...Ch. 9.9 - Prob. 9.23CPCh. 9.9 - Prob. 9.24CPCh. 9.9 - Prob. 9.25CPCh. 9.9 - Prob. 9.26CPCh. 9.9 - Prob. 9.27CPCh. 9.9 - Prob. 9.28CPCh. 9 - In an inheritance relationship, this is the...Ch. 9 - In an inheritance relationship, this is the...Ch. 9 - This key word indicates that a class inherits from...Ch. 9 - A subclass does not have access to these...Ch. 9 - This key word refers to an objects superclass. a....Ch. 9 - In a subclass constructor, a call to the...Ch. 9 - The following is an explicit call to the...Ch. 9 - A method in a subclass that has the same signature...Ch. 9 - A method in a subclass having the same name as a...Ch. 9 - These superclass members are accessible to...Ch. 9 - Prob. 11MCCh. 9 - With this type of binding, the Java Virtual...Ch. 9 - Prob. 13MCCh. 9 - Prob. 14MCCh. 9 - Prob. 15MCCh. 9 - Abstract classes cannot ___________. a. be used as...Ch. 9 - You use the __________ operator to define an...Ch. 9 - Prob. 18MCCh. 9 - Prob. 19MCCh. 9 - You can use a lambda expression to instantiate an...Ch. 9 - True or False: Constructors are not inherited.Ch. 9 - True or False: in a subclass, a call to the...Ch. 9 - True or False: If a subclass constructor does not...Ch. 9 - True or False: An object of a superclass can...Ch. 9 - True or False: The superclass constructor always...Ch. 9 - True or False: When a method is declared with the...Ch. 9 - True or False: A superclass has a member with...Ch. 9 - True or False: A superclass reference variable can...Ch. 9 - True or False: A subclass reference variable can...Ch. 9 - True or False: When a class contains an abstract...Ch. 9 - True or False: A class may only implement one...Ch. 9 - True or False: By default all members of an...Ch. 9 - // Superclass public class Vehicle { (Member...Ch. 9 - // Superclass public class Vehicle { private...Ch. 9 - // Superclass public class Vehicle { private...Ch. 9 - // Superclass public class Vehicle { public...Ch. 9 - Write the first line of the definition for a...Ch. 9 - Look at the following code, which is the first...Ch. 9 - Write the declaration for class B. The classs...Ch. 9 - Write the statement that calls a superclass...Ch. 9 - A superclass has the following method: public void...Ch. 9 - A superclass has the following abstract method:...Ch. 9 - Prob. 7AWCh. 9 - Prob. 8AWCh. 9 - Look at the following interface: public interface...Ch. 9 - Prob. 1SACh. 9 - A program uses two classes: Animal and Dog. Which...Ch. 9 - What is the superclass and what is the subclass in...Ch. 9 - What is the difference between a protected class...Ch. 9 - Can a subclass ever directly access the private...Ch. 9 - Which constructor is called first, that of the...Ch. 9 - What is the difference between overriding a...Ch. 9 - Prob. 8SACh. 9 - Prob. 9SACh. 9 - Prob. 10SACh. 9 - What is an. abstract class?Ch. 9 - Prob. 12SACh. 9 - When you instantiate an anonymous inner class, the...Ch. 9 - Prob. 14SACh. 9 - Prob. 15SACh. 9 - Employee and ProductionWorker Classes Design a...Ch. 9 - ShiftSupervisor Class In a particular factory, a...Ch. 9 - TeamLeader Class In a particular factory, a team...Ch. 9 - Essay Class Design an Essay class that extends the...Ch. 9 - Course Grades In a course, a teacher gives the...Ch. 9 - Analyzable Interface Modify the CourseGrades class...Ch. 9 - Person and Customer Classes Design a class named...Ch. 9 - PreferredCustomer Class A retail store has a...Ch. 9 - BankAccount and SavingsAccount Classes Design an...Ch. 9 - Ship, CruiseShip, and CargoShip Classes Design a...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
The Upper West View Yacht club sponsors sailboat races every weekend for its fleet of SuperGee sailboats, and w...
Starting Out With Visual Basic (8th Edition)
True or False: The new operator creates an instance of a class.
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Compare and contrast the break and continue statements.
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
Stock Profit The profit from the sale of a stock can be calculated as follows: Profit=((NSSP)SC)((NSPP)+PC) whe...
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
What does the statement print (format (65.4321, '.2f')) display?
Starting Out with Python (4th Edition)
Give examples (outside of computer science) of each of the following structures, list, stack, queue, and tree.
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Java program: 1. Write a PaypalAccount class to include both balance and accountID as the instance variables. Make sure each instance of this account will have a unique accountID. In other words, different account object should have different accountID (hint: class variable). 2. Write a Bank class with main method. In the main method, ask the user to input how many accounts (say numOfAccount) to be generated in the bank (assuming less than 1000). Then create an array to hold these numOfAccount of Account objects. For eachAccount object, generate a random balance in the range of 0.0-1000.0. Assume that your campus ID is 141-88-2014; search the array to see if there is an account with accountID as 141 (the first three digits of your campus ID). If there is not an account with accountID as 141, then set the accountID of the last account in the array as 141; transfer all the balance of the first account to the account with accountID of 141. Set the balance of the account with accountID…arrow_forwardURGENtt!! You are asked to write a java class named "Kume". The UML class diagram of the Kume class is as follows. 3 The elements in the set are kept in an ArrayList. The constructor of the class takes an array of int and adds the elements of this array to the ArrayList named al. The add() method adds an integer it takes as a parameter to the get element. The delete() method deletes an Integer object that it takes as a parameter from the get element, returns true if it can be deleted, otherwise false. The print() function prints the elements of the set to the console. The compareTo() method is inherited from the Object class and is suppressed, and compares the get element of the Set object, which it takes as a parameter, with the retrieve element of the current set object in terms of content (the order of the elements is not important). It returns 1 if both sets contain the same elements, 0 otherwise. Below is a test code that creates two objects from the Kume class and performs…arrow_forwardYou are required to design an Movie class which has following attributes String title; String director; Int duration; String release_Date; Provide default & Parameterized constructors. Provide getters & setters for data members. Provide a toString() method to print values. Now create an array of Movie store values in it (take values form user). After that you have to print the following All the movies in the array. Movie’s whose name starts with ‘a’; Movie with longest duration. All the movies having release date before 25-3-2021.arrow_forward
- Part 1: You are required to build an application to assist in the conduct of Assessments. The class Assessment represent the notion of any kind of assessment including Quiz, Assignment and Examination. Please follow the given steps to implement the applications 1. Construct a class Assessment with the following attributes a. Id (int) b. Topic(String) c. MaxMarks(double) d. Date of conduct (doc) (GregorianCalendar) e. attempts ArrayList //an array list that will contain the Attempts objects 2. In order to complete the above class you will have to write a class Attempt with the following attributes. This class represents the attempts that students have made against this assessment. a. studentId(int) b. studentName(String) c. marksObtained(double) 3. Provide constructor in Attempt class with values for all attributes 4. Provide getters and setters for each 5. Provide a toString method that produces the following string Student = --id-- : name Marks Obtained : --marks— 6. Now complete the…arrow_forwardDefine a class called Country. A Country has populationSize, area, capital, currency, and abbreviation (2-3 letters taken from the country name). Define at least two constructors, at least two getter methods, at least two setter methods, and Override the toString() method and the equals() method. The equals() method must return true if the two countries have the same name and same area and false otherwise. 1) Write a main method, define an array of country objects 2) Display countries whose populationSize is greater than one million.arrow_forwardExcercise: Listed next is the skeleton for a class named City. Each city has a name and temperature: public class City { private String cityName; private int temperature; } Flesh out the class with appropriate accessors, constructors, and mutators. Next, modify the class so that it implements the Comparable interface. The order between instances of the City class depends on the temperature. Test your class by creating an array of sample cities and sort them in an ascending order using Arrays.sort Notes: The language used for this question is Java. So far, this is the City class after fleshing it out: public class City implements Comparable<City> {private String cityName;private double temperature; public City() {} public City(String cityName, double temperature) {this.cityName = cityName;this.temperature = temperature;} public String getCityName() {return cityName;} public double getTemperature() {return temperature;} public void setName(String cityName)…arrow_forward
- Design a new Account class as follows:■■ Add a new data field name of the String type to store the name of thecustomer.■■ Add a new constructor that constructs an account with the specified name, id,and balance.■■ Add a new data field named transactions whose type is ArrayList thatstores the transaction for the accounts. Each transaction is an instance of theTransaction class, which is defined as shown in Figure ■■ Modify the withdraw and deposit methods to add a transaction to thetransactions array list. Write a test program that creates an Account with annual interest rate 1.5%,balance 1000, id 1122, and name George. Deposit $30, $40, and $50 to theaccount and withdraw $5, $4, and $2 from the account. Print an account summarythat shows the account holder name, interest rate, balance, and all transactions.arrow_forwardIn Assignment 4, you created a Card class that represents a standard playing card. Use this to design and implement a class called DeckOfCards that stores 52 objects of the Card class using an array. Include methods to shuffle the deck, deal a card, return the number of cards left in the deck, and a toString to show the contents of the deck. The shuffle methods should assume a full deck. Document your design with a UML Class diagram. Create a separate driver class that first outputs the populated deck to prove it is complete, shuffles the deck, and then deals each card from a shuffled deck, displaying each card as it is dealt along with the number of cards left in the deck. Hint: The constructor for DeckOfCards should have nested for loops for the face values (1 to 13) within the suit values (1 to 4) calling the two parameter constructor. The shuffle method does not have to simulate how a deck is physically shuffled; you can achieve the same effect by repeatedly swapping pairs of…arrow_forwardIn Assignment 4, you created a Card class that represents a standard playing card. Use this to design and implement a class called DeckOfCards that stores 52 objects of the Card class using an array. Include methods to shuffle the deck, deal a card, return the number of cards left in the deck, and a toString to show the contents of the deck. The shuffle methods should assume a full deck. Document your design with a UML Class diagram. Create a separate driver class that first outputs the populated deck to prove it is complete, shuffles the deck, and then deals each card from a shuffled deck, displaying each card as it is dealt along with the number of cards left in the deck. Hint: The constructor for DeckOfCards should have nested for loops for the face values (1 to 13) within the suit values (1 to 4) calling the two parameter constructor. The shuffle method does not have to simulate how a deck is physically shuffled; you can achieve the same effect by repeatedly swapping pairs of…arrow_forward
- ShoppingCart.java - Class definition ShoppingCartManager.java - Contains main() method Build the ShoppingCart class with the following specifications. Private fields String customerName - Initialized in default constructor to "none" String currentDate - Initialized in default constructor to "January 1, 2016" ArrayList cartItems Default constructor Parameterized constructor which takes the customer name and date as parameters Public member methods getCustomerName() accessor getDate() accessor addItem() Adds an item to cartItems array. Has a parameter of type ItemToPurchase. Does not return anything. removeItem() Removes item from cartItems array. Has a string (an item's name) parameter. Does not return anything. If item name cannot be found, output a message: Item not found in cart. Nothing removed. modifyItem() Modifies an item's description, price, and/or quantity. Has a parameter of type ItemToPurchase. Does not return anything. If item can be found (by name) in cart,…arrow_forwardDefine a class called Book. The Book class should store attributes such as the title, ISBN, author, edition, publisher, and year of publication. These attributes must be private. Provide public get/set methods in this class to access these attributes. Test your Book class by creating several books and displaying the attributes. Define a class called Bookshelf, which contains only a main() method. The Bookshelf class must create a dozen (12) Book objects with distinct attributes, and it must store them in an ArrayList of Books. The Bookshelf class must then list all the attributes of all books in the ArrayList in the order they were entered into the ArrayList. Create a sort function for Bookshelf, which will sort books in the ArrayList in ascending order by name, and then by year of publication.arrow_forwardYou are required to design an item class which has following attributes String name; Int stock; Int price; String expiry_Date; Provide default & Parameterized constructors. Provide getters & setters for data members. Provide a toString() method to print values. Now create an array of items store values in it (take values form user). After that you have to print the following All the items in the array. items whose name starts with ‘a’; All sold out items (whose stock is zero). All the items having expire date before 2-11-2020. Solve this using Simple java, arrays in java and string methods if required.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
Program to find HCF & LCM of two numbers in C | #6 Coding Bytes; Author: FACE Prep;https://www.youtube.com/watch?v=mZA3cdalYN4;License: Standard YouTube License, CC-BY