4. Consider a Person class (which keeps track of a Person’s name) and a Student class (which keeps track of a Student’s name and student ID number). State the relationship between the two classes as either an is-a or a has-a relationship (similar to the last sentence of each paragraph in the above Model). ### "Is-a" versus "Has-a"A large program will often be built out of multiple classes. Often, these classes will have a “has-a” relationship. For example, a game program might include three classes: PlayingCard, Suit, and Rank. A PlayingCard object **has a** Suit and **has a** Rank, which are handled in a Java program as instance variables.#### Diagram ExplanationThe diagram below illustrates the `PlayingCard` class and its components:``` ______________________ | PlayingCard | <- Class Name |______________________| | - cardRank: Rank | <- Data Fields | - cardSuit: Suit | |______________________| | + setRank(Rank rank): void | <- Methods | + setSuit(Suit suit): void | | + getRank(): Rank | | + getSuit(): Suit | |______________________|```This diagram is divided into three sections:1. **Class Name**: The name of the class (`PlayingCard`).2. **Data Fields**: Instance variables (`cardRank` and `cardSuit`), which are of types `Rank` and `Suit`.3. **Methods**: Functions that can be used to set and get the values of `cardRank` and `cardSuit` (`setRank`, `setSuit`, `getRank`, and `getSuit`).Less often, you might have two classes which have an “is-a” relationship, where one class is a more general class, while the second class is a more specialized version of the original class. A blackjack program might have a `BlackJackCard` class which **is a** `PlayingCard`. Notice the relationship is not symmetrical: every `BlackJackCard` **is a** `PlayingCard`, but not every `PlayingCard** is a** `BlackJackCard`.

OOP or Object-Oriented Programming is a software model that is designed around data or objects…

Consider a Person class (which keeps track of a Person’s name) and a Student class (which keeps track of a Student’s name and student ID number). State the relationship between the two classes as either an is-a or a has-a relationship (similar to the last sentence of each paragraph in the above Model).

Consider a Person class (which keeps track of a Person’s name) and a Student class (which keeps track of a Student’s name and student ID number). State the relationship between the two classes as either an is-a or a has-a relationship (similar to the last sentence of each paragraph in the above Model).

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter4: More Object Concepts

Section: Chapter Questions

Problem 15RQ

See similar textbooks

Similar questions

Object Oriented Programming in JAVA You are part of a team writing classes for the different game objects in a video game. You need to write classes for the two human objects warrior and politician. A warrior has the attributes name (of type String) and speed (of type int). Speed is a measure of how fast the warrior can run and fight. A politician has the attributes name (of type String) and diplomacy (of type int). Diplomacy is the ability to outwit an adversary without using force. From this description identify a superclass as well as two subclasses. Each of these three classes need to have a default constructor, a constructor with parameters for all the instance variables in that class (as well as any instance variables inherited from a superclass) accessor (get) and mutator (set) methods for all instance variables and a toString method. The toString method needs to return a string representation of the object. Also write a main method for each class in which that class is…
java programming language You are part of a team writing classes for the different game objects in a video game. You need to write classes for the two human objects warrior and politician. A warrior has the attributes name (of type String) and speed (of type int). Speed is a measure of how fast the warrior can run and fight. A politician has the attributes name (of type String) and diplomacy (of type int). Diplomacy is the ability to outwit an adversary without using force. From this description identify a superclass as well as two subclasses. Each of these three classes need to have a default constructor, a constructor with parameters for all the instance variables in that class (as well as any instance variables inherited from a superclass) accessor (get) and mutator (set) methods for all instance variables and a toString method. The toString method needs to return a string representation of the object. Also write a main method for each class in which that class is tested – create…
Which import statement should be included in the source code of a class so that the Math class is explicitly imported? Choose from the given choices. *
Library Information System Design and Testing Library Item Class Design and TestingDesign a class that holds the Library Item Information, with item name, author, publisher. Write appropriate accessor and mutator methods. Also, write a tester program(Console and GUI Program) that creates three instances/objects of the Library Items class. Extending Library Item Class Library and Book Classes: Extend the Library Item class in (1) with a Book class with data attributes for a book’s title, author, publisher and an additional attributes as number of pages, and a Boolean data attribute indicating whether there is both hard copy as well as eBook version of the book. Demonstrate Book Class in a Tester Program (Console and GUI Program) with an object of Book class.
Help for Java Programming Create a proof of concept class design based on the following ideas in Java Take a look at your refrigerator and think about how you would model it as a class. Considerations include: A refrigerator is made by a company on a manufacturing date and has an overall size based on length, width, and height A refrigerator contains a number of shelves and drawers for storing dairy, meats, and vegetables A refrigerator also has storage areas on the door for things like bottled items, condiments, jars, etc. Some refrigerators have a freezer side or section as well for storing meats, frozen food products, etc. Some refrigerators have an ice maker and drinking water filter There are also different types of items you can store in the refrigerator. Considerations here include: All items at least have some kind of id, name, and price All items are put in the refrigerator on a specific date, and some items are perishable that expire on a specific date The descriptions…
9 public class PictureViewer 10{ public static void main(String[] args) 11 12 // Step 2: Fix the syntax errors and submit it to Codecheck to pass the test. // Note: Do not add or remove any statements 13 // 14 15 // Do not change the semantics of each statement Do not add or remove any variables Do not add or remove any objects Magic numbers are allowed 16 17 18 // 19 // 20 // Create an object of Picture by loading an image Picture pic = Picture("starry_night.png"); 21 22 23 // Display the width and height System.out.println("Width : " + pic.getWidth()); System.out.println("Height: 24 25 + pic.getHeight()); %3D 26 27 // Increase the width by 50 on both sides and // increase the height by 40 on both sides. // Must use dw and dh when calling method grow(). int dw, dh = 40; pic.grow(dw, dh); 28 29 30 31 32 33 // Display the width and height System.out.println("Width : System.out.println("Height: 34 + pic.getWidth()); + pic.getHeight()); 35 36 37 // Draw the picture draw(); 38 39 40 //…
java A constructor is a special method that has the same name as the class and the return type void. Choose one of the options:TrueFalse
public class StairViewer public static void main(String(] args) // Step 2: Create a rectangle and draw it as the // top step of the stair // location: (20, 10) // size: (20, 20) 18 // Step 3: Create a rectangle and draw it as the 19 // middle step of the stair 20 // location: below the top step, aligned on left // size: (40, 20) 21 22 23 24 // Step 4: Create a rectangle and draw it as the 25 // bottom step of the stair 26 // location: below the middle step, aligned on left // size: (60, 20) 27 28 29 30 } 31 32
A Java class can contain Variables Methods, Constructors Inner Classes (A class inside another class) O All the above
Creating Methods in Java Design and write a Java program that calculates and displays the results of a sales transaction. Two classes are to be defined as follows: Class Name: Sales Input Variables: quantity - an integer value a floating point value (to be entered as percent commissionRate - a double value (example: 8.5%) discountPerCent - a double value (example: 6.5%) values) Processing: There are four input values as defined above. These variables are to be declared inside main().The main() method of this class should accept the quantity, price, commission rate, and discount percent from the keyboard (echo the inputs back to the screen) and call the appropriate functions described below to calculate the final sales transaction amount. main() should also display the initial sales amount. Methods: Class Name: saleAmt() - The quantity and price are passed to this method. It returns the sale amount to the calling method. netSale() - The sale amount, commission amount, and discount…
In Java programming (Lesson: Objects, Classes, and Constructors) Every class has a constructor and if we do not explicitly write a constructor for a class, the java compiler builds a default constructor for that class. False or True Please provide an explanation for the answer. Thank you!
True or False A class can implement more than one interface.