Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
7th Edition
ISBN: 9780134802213
Author: Tony Gaddis
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 10, Problem 2FTE
// Superclass
public class Vehicle
{
private double cost;
(Other methods …)
}
// Subclass
public class Car extends Vehicle
{
public Car (double c)
{
cost = c;
}
}
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
8. OOPS Theory #6
public class Car {
public void horn() {
System.out.println("Horn horn");
}
}
public class Ferrari extends Car {
public void horn() {
System.out.println("Ferarriiiiii");
}
}
public static void main(String[] args) {
Ferrari ferrari = new Car();
ferrari.horn();
}
Pick ONE option
Horn horn
Ferarriiii
Cannot compile
Runtime exception
Clear Selection
9. OOPS Theory #7
In Java, we can achieve the abstraction by creating the blueprint of an object and only have abstract methods. What do we call this?
Pick ONE option
Interface
Encapsulation
Instance
Protected
Clear Selection
class A{
void methodA(){}
void methodB();
}
class B extends A{
void methodA(){ }
}
class A should be abstract
methodB should be abstract
both a and b
both classes are okay
Find the error in each of the following code segments:
// Superclasspublic class Vehicle{private double cost;(Other methods . . .)}// Subclasspublic class Car extends Vehicle{public Car(double c){cost = c;}}
Chapter 10 Solutions
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Ch. 10.1 - Here is the first line of a class declaration....Ch. 10.1 - Look at the following class declarations and...Ch. 10.1 - Class B extends class A. (Class A is the...Ch. 10.2 - Prob. 10.4CPCh. 10.2 - Look at the following classes: public class Ground...Ch. 10.3 - Under what circumstances would a subclass need to...Ch. 10.3 - How can a subclass method call an overridden...Ch. 10.3 - If a method in a subclass has the same signature...Ch. 10.3 - If a method in a subclass has the same name as a...Ch. 10.3 - Prob. 10.10CP
Ch. 10.4 - When a class member is declared as protected, what...Ch. 10.4 - What is the difference between private members and...Ch. 10.4 - Why should you avoid making class members...Ch. 10.4 - Prob. 10.14CPCh. 10.4 - Why is it easy to give package access to a class...Ch. 10.6 - Look at the following class definition: public...Ch. 10.6 - When you create a class, it automatically has a...Ch. 10.7 - Recall the Rectangle and Cube classes discussed...Ch. 10.8 - Prob. 10.19CPCh. 10.8 - If a subclass extends a superclass with an...Ch. 10.8 - What is the purpose of an abstract class?Ch. 10.8 - If a class is defined as abstract, what can you...Ch. 10.9 - Prob. 10.23CPCh. 10.9 - Prob. 10.24CPCh. 10.9 - Prob. 10.25CPCh. 10.9 - Prob. 10.26CPCh. 10.9 - Prob. 10.27CPCh. 10.9 - Prob. 10.28CPCh. 10 - In an inheritance relationship, this is the...Ch. 10 - In an inheritance relationship, this is the...Ch. 10 - This key word indicates that a class inherits from...Ch. 10 - A subclass does not have access to these...Ch. 10 - This key word refers to an objects superclass. a....Ch. 10 - In a subclass constructor, a call to the...Ch. 10 - The following is an explicit call to the...Ch. 10 - A method in a subclass that has the same signature...Ch. 10 - A method in a subclass having the same name as a...Ch. 10 - These superclass members are accessible to...Ch. 10 - Prob. 11MCCh. 10 - With this type of binding, the Java Virtual...Ch. 10 - This operator can be used to determine whether a...Ch. 10 - When a class implements an interface, it must...Ch. 10 - Prob. 15MCCh. 10 - Prob. 16MCCh. 10 - Abstract classes cannot ___________. a. be used as...Ch. 10 - You use the __________ operator to define an...Ch. 10 - Prob. 19MCCh. 10 - Prob. 20MCCh. 10 - You can use a lambda expression to instantiate an...Ch. 10 - True or False: Constructors are not inherited.Ch. 10 - True or False: in a subclass, a call to the...Ch. 10 - True or False: If a subclass constructor does not...Ch. 10 - True or False: An object of a superclass can...Ch. 10 - True or False: The superclass constructor always...Ch. 10 - True or False: When a method is declared with the...Ch. 10 - True or False: A superclass has a member with...Ch. 10 - True or False: A superclass reference variable can...Ch. 10 - True or False: A subclass reference variable can...Ch. 10 - True or False: When a class contains an abstract...Ch. 10 - True or False: A class may only implement one...Ch. 10 - True or False: By default all members of an...Ch. 10 - // Superclass public class Vehicle { (Member...Ch. 10 - // Superclass public class Vehicle { private...Ch. 10 - // Superclass public class Vehicle { private...Ch. 10 - // Superclass public class Vehicle { public...Ch. 10 - Write the first line of the definition for a...Ch. 10 - Look at the following code, which is the first...Ch. 10 - Write the declaration for class B. The classs...Ch. 10 - Write the statement that calls a superclass...Ch. 10 - A superclass has the following method: public void...Ch. 10 - A superclass has the following abstract method:...Ch. 10 - Prob. 7AWCh. 10 - Prob. 8AWCh. 10 - Look at the following interface: public interface...Ch. 10 - Prob. 1SACh. 10 - A program uses two classes: Animal and Dog. Which...Ch. 10 - What is the superclass and what is the subclass in...Ch. 10 - What is the difference between a protected class...Ch. 10 - Can a subclass ever directly access the private...Ch. 10 - Which constructor is called first, that of the...Ch. 10 - What is the difference between overriding a...Ch. 10 - Prob. 8SACh. 10 - Prob. 9SACh. 10 - Prob. 10SACh. 10 - What is an. abstract class?Ch. 10 - Prob. 12SACh. 10 - When you instantiate an anonymous inner class, the...Ch. 10 - Prob. 14SACh. 10 - Prob. 15SACh. 10 - Employee and ProductionWorker Classes Design a...Ch. 10 - ShiftSupervisor Class In a particular factory, a...Ch. 10 - TeamLeader Class In a particular factory, a team...Ch. 10 - Essay Class Design an Essay class that extends the...Ch. 10 - Course Grades In a course, a teacher gives the...Ch. 10 - Analyzable Interface Modify the CourseGrades class...Ch. 10 - Person and Customer Classes Design a class named...Ch. 10 - PreferredCustomer Class A retail store has a...Ch. 10 - BankAccount and SavingsAccount Classes Design an...Ch. 10 - Ship, CruiseShip, and CargoShip Classes Design a...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Fill in the blanks in each of the following: Keyword requests memory from the system to store an object, then c...
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
The size, shape, color and weight of an object are considered of the objects class.
Java How To Program (Early Objects)
A class that cannot be instantiated is a(n) _____ .
Starting Out with C++: Early Objects
If the Vole executes an instruction every microsecond (a millionth of a second), how long does it take to compl...
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
- Code: interface Bicycle{ //interface for bicycle void changeGear(int val); //abstract methods void changeSpeed(int inc); void applyBrakes(int dec); void ringBell(int count); } class NewCycle implements Bicycle{ //class for a new cycle int speed=0; //stores the speed value int gear=0; //stores the gear value @Override public void changeGear(int val) { //method to change the gear gear=val; } @Override public void changeSpeed(int inc) { //method to change the speed speed=speed+inc; } @Override public void applyBrakes(int dec) { //method to apply brakes speed=speed-dec; } @Override public void ringBell(int count) { //method to ring the bell for(int i=0;i<count;i++){ System.out.print("Clang!!"+" "); } System.out.println(""); } public void printState(){ //method to print the states System.out.println("Ring bell, Speed, Gear,…arrow_forwardWhat is the output of the following code? Convert the abstract class into an interface and modify the codes in all classes that will maintain the same output. (Rewrite the code)arrow_forwardTrue or False A subclass can override methods from its superclass.arrow_forward
- public class FoodItem { private String name; private double fat; private double carbs; private double protein; // TODO: Define default constructor // TODO: Define second constructor with parameters to initialize private fields (name, fat, carbs, protein) public String getName() { return name; } public double getFat() { return fat; } public double getCarbs() { return carbs; } public double getProtein() { return protein; } public double getCalories(double numServings) { // Calorie formula double calories = ((fat * 9) + (carbs * 4) + (protein * 4)) * numServings; return calories; } public void printInfo() { System.out.println("Nutritional information per serving of " + name + ":"); System.out.printf(" Fat: %.2f g\n", fat); System.out.printf(" Carbohydrates: %.2f g\n", carbs); System.out.printf(" Protein: %.2f g\n", protein); }} import java.util.Scanner; public class NutritionalInfo {…arrow_forwardQUESTION 15 public class numClass { private int a; private static int y = 10; public numClass(int newX) {a=newx; } public void set(int newx) { a=newx; y+=a; } public void setY(int newy) { y=newY; } public static int getY() { return y; } }// end of class public class output { public static void main(String[] args) { numClass one = new numClass(10); numClass two = new numClass (2); try{ one. sety(30); two.set(4); if(one.getY()==30) throw new Exception ("30"); one.setY(40); } catch (Exception e) { two.sety (50); } System.out.println(two.getY()); }// end of main } // end of classarrow_forwardConver the class To UML diagram class Clint { private String accNumber; private String holderName; private long currBalance; public Clint() { currBalance = 0; } public Clint(String acc, String name, long bal) { accNumber = acc; holderName = name; currBalance = bal; } Scanner sc = new Scanner(System.in); // deposit money into the bank account by given amount amt public void deposit(long amt) { currBalance += amt; } // if amount is not given ask the user for the amount public void deposit() { System.out.print("Enter Amount(to deposit): $"); long amt = sc.nextLong(); currBalance += amt; } // withdraw money from the bank account public void withdraw(long amt) { if (currBalance >= amt) { currBalance -= amt; } else { System.out.println("Insufficient funds!"); } } // if amt is not given ask the user for the amount public…arrow_forward
- 49. Consider the following class definition. public class Cylinder } private double baseRadius; private double height; public Cylinder () baseRadius = 0; height = 0; public Cylinder (double 1, double h) } baseRadius - 1; height = h; { public void set (double r, double h) } baseRadius = r; height = h; { public String toString () } return (baseRadius + It n + height); { public double SurfaceArea () return 2 * 3.14 * baseRadius height; public double volume () } return 3.14 baseRadius * baseRadius * height; { Which of the following statements correctly instantiates the Cylinder object myCylinder? (i) Cylinder mycylinder = new Cylinder (2.5, 7.3) : (ii) class Cylinder myCylinder = new Cylinder (2.5, 7.3); (ii) myCylinder new Cylinder (2.5, 7.3); %3D a. Only (i) b. Only (i) c. Only (iüi) d. Both (ii) and (ii)arrow_forwardTrue or False, An abstract class must have at least one abstract method.arrow_forwardpublic class Cylinder { public void smoothen() { } } } public abstract class Vessel implements Steerable { private Engine e; } System.out.println("Smoothening.."); public Engine getEngine() { return e; } public void setEngine (Engine e) { this.e = e; } public abstract void turnOn(); public class Engine { private Cylinder [] y; private int cyls = 1; static final int maxCylinders = 12; public void addCylinder (Cylinder y) { if (cylsarrow_forwardpublic class Cat extends Pet { private String breed; public void setBreed(String userBreed) { breed = userBreed; } public String getBreed() { return breed; }} public class Pet { protected String name; protected int age; public void setName(String userName) { name = userName; } public String getName() { return name; } public void setAge(int userAge) { age = userAge; } public int getAge() { return age; } public void printInfo() { System.out.println("Pet Information: "); System.out.println(" Name: " + name); System.out.println(" Age: " + age); } } import java.util.Scanner; public class PetInformation { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); // create a generic Pet and a Cat Pet myPet = new Pet(); Cat myCat = new Cat(); // declare variables for pet and cat info String petName, catName, catBreed; int petAge,…arrow_forward7. public class Father { public String name; public int age; // customer name Father(){ name="Hassan"; age=50;} public void display(){ System.out.println("Name:"+name); System.out.println("Age:"+age); }} Figure 3 i. Based on Figure 3, create a class named Child that inherits the Father class. Declare an instance name location (String) for class Child. ii. Define a constructor in class Child and give an appropriate initial values for the instance (name, age, location). Define a method display () in class Child, execute the display () method in superclass using the keyword super. Method display () in class Child should print the information of name, age and location. ii.arrow_forward4. Consider the following classes: public class Animal { public Animal (String itsNane) { name = public void setName (String itsName) { name = itsName; public String getName () it&Nane; } } { return name; } private String name; } public class Dog extends Animal public Dog (String itsName) { super (itsName + "Dog"); sound = "Bark!"; min } public void setSound (String itsSound) { sound public String getsewnd () public String getName (int choice) { if(choice > 0) return super getName (); else return "AnyDog" ; public String getName () itsSound; + sound); } { return (gstNane (0) } } { return super.getName() + "OK"; } private String sound; } In addition, the following lines of code has been placed in a main class public static void main(String[] axge) new Animal("Tweety"); new Dog ("Rover"); = new Dog ("Spot"); { Animal al Animal a2 = Dog dl } Give the values of the following expressions. If an expression is erroneous, state why. a) al.getName () i) d1 instanceof Animal j) al instanceof Dog…arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:CengageEBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENTMicrosoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
- Systems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage Learning
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
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,
Systems Architecture
Computer Science
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Cengage Learning
Introduction to Classes and Objects - Part 1 (Data Structures & Algorithms #3); Author: CS Dojo;https://www.youtube.com/watch?v=8yjkWGRlUmY;License: Standard YouTube License, CC-BY