Java Programming
8th Edition
ISBN: 9781305981829
Author: Joyce Farrell
Publisher: Cengage Limited
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Chapter 1, Problem 4PE
a.
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Three real-life objects that are instances of class “Movie”
b.
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Three real-life objects that are instances of class “Team”
c.
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Three real-life objects that are instances of class “Musician
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5. class definition for GameEnemy
Next, we want to start making enemies for our upcoming video game, so we will define a class called GameEnemy.
Every GameEnemy will have a name, an x location, a y location, and a number of hit points (which must be a non-
negative integer ). The_init__ method for GameEnemy will take all of these parameters (in that order) and store them
on the object. GameEnemy also needs a method called healthbar, which will allow us to show that enemy's health bar in
the game. It returns the enemy's name followed by a number of asterisks to show how many hit points it has left. The
exact format is shown below.
Sample runs should look like:
>>> enemy = GameEnemy ("TODD", 100, 200, 5)
>>> enemy.healthbar()
TODD: ******
>>> enemy-%
ence
100
>>> enemy-y
200
If vou havo qu octiona
To determine if two objects in a class are equal, we should NOT use "==". We should override the _____ method of the Object class with our own definition of equality.
This is the question -
Create a class named Rock that acts as a superclass for rock samples collected and catalogued by a natural history museum. The Rock class contains the following fields:
sampleNumber - of type int
description - A description of the type of rock (of type String)
weight - The weight of the rock in grams (of type double)
Include a constructor that accepts parameters for the sample number and weight. The Rock constructor sets the description value to "Unclassified". Include get methods for each field.
Create three child classes named IgneousRock, SedimentaryRock, and MetamorphicRock. The constructors for these classes require parameters for the sample number and weight. Search the Internet for a brief description of each rock type and assign it to the description field using a method named setDescription inside of the constructor.
This is the code I have, the program does not like at all what I have -
import java.util.*;
public class DemoRock {
public static…
Chapter 1 Solutions
Java Programming
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- At most, a class can contain ____________ method(S). 0 1 2 any number ofarrow_forwardWrite a program named SalespersonDemo that instantiates objects using classes named Real EstateSalesperson and GirlScout. Demonstrate that each object can use a SalesSpeech() method appropriately. Also, use a MakeSale() method two or three times with each object, and display the final contents of each objects data fields. First, create an abstract class named Salesperson. Fields include first and last names; the Salesperson constructor requires both these values. Include properties for the fields. Include a method that returns a string that holds the Salespersons full name—the first and last names separated by a space. Then perform the following Create two child classes of Salesperson: Real EstateSalesperson and Girl Scout. The Real EstateSalesperson class contains fields for total value sold in dollars and total commission earned (both of which are initialized to 0), and a commission rate field required by the class constructor. The Girl Scout class includes a field to hold the number of boxes of cookies sold, which is initialized to 0. Include properties for every field. Create an interface named ISell able that contains two methods: SalesSpeech() and MakeSale(). In each Real EstateSalesperson and Girl Scout class, implement SalesSpeech() to display an appropriate one- or two-sentence sales speech that the objects of the class could use. In the Real Estatesalesperson class, implement the MakeSale() method to accept an integer dollar value for a house, add the value to the Real EstateSalespersons total value sold, and compute the total commission earned. In the Girl Scout class, implement the MakeSale() method to accept an integer representing the number of boxes of cookies sold and add it to the total field.arrow_forward1. Idenify three objects that might belong to each of the following classes: a. author b. raceHorse c. country d. retailPurchacearrow_forward
- This is the question - Create a class named Rock that acts as a superclass for rock samples collected and catalogued by a natural history museum. The Rock class contains the following fields: sampleNumber - of type int description - A description of the type of rock (of type String) weight - The weight of the rock in grams (of type double) Include a constructor that accepts parameters for the sample number and weight. The Rock constructor sets the description value to "Unclassified". Include get methods for each field. Create three child classes named IgneousRock, SedimentaryRock, and MetamorphicRock. The constructors for these classes require parameters for the sample number and weight. Search the Internet for a brief description of each rock type and assign it to the description field using a method named setDescription inside of the constructor. I am only missing two checks and they seem to be with the rock, here is my code then I will copy one check - import java.util.*;…arrow_forwardQuestion 6 Create a set of classes and interface for the following scenario: Define an interface called Classical Music, which contains a get Year method that returns the year the classical album released. Create an abstract class Called CD. This class contains the title as String, and playingTime as integer (e.g. 60 minutes). Include a constructor to initialize all the data fields. Create an abstract method called printPlayingTime to show the CD playing details. Make sure all the data fields can be accessed directly from the child classes. Create a class called Album that inherits from the CD and Classical Music. Include a data field called year as integer type. Create a constructor to initialize all the data members. Override the getYear method to return the released year. Override the printPlayingTime method. If the CD title is more than 10 characters, this method will print the first 10 characters, followed by the three ellipse dots and the playing time. For example: Thriller 60…arrow_forwardObject composition is useful for creating an Is-A relationship between classes. is it True or False ??arrow_forward
- Create a class of Dog, some of the differences you might have listed out maybe breed, age, size, color, etc. Then create characteristics (breed, age, size, color) can form a data member for your object. Then list out the common behaviors of these dogs like sleep, sit, eat, etc. Design the class dogs with objects and methods.arrow_forwardFill in the blanks to indicate the type of relationship between the classes listed below (use IS_A, HAS_A or N/A) Student String Schedule Student UniversityMember BookStorePreferredCustomer Student BookStorePreferredCustomer CanGraduate UniversityMember Student IDarrow_forwardDescribe the class's private and public components.arrow_forward
- The non-static class level variables and non-static methods of a class are known as a. instance members b. object behaviors c. object attributes O d. object referencesarrow_forwardWrite a shoe class with the following attributes: color (e.g., "blue", "green", "orange") displayName (e.g., "nikes, adidas", "puma") price (e.g., 100, 200,60) Include only one constructor. It should have parameters for each of the attributes and set their values. Additionally, include getters and setters for each of the attributes. Add a driver, name it Purchases, and create 2 objects. Finally, print out some information about both objects (i.e., print the information from some or all of the getters). For example, if you created a shoe object whose color was blue, whose display name was shoes , for a price of 230, you could use the getters to print something like this:These work trousers are blue and cost $230arrow_forwardAssignment:The BankAccount class models an account of a customer. A BankAccount has the followinginstance variables: A unique account id sequentially assigned when the Bank Account is created. A balance which represents the amount of money in the account A date created which is the date on which the account is created.The following methods are defined in the BankAccount class: Withdraw – subtract money from the balance Deposit – add money to the balance Inquiry on:o Balanceo Account ido Date createdarrow_forward
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