public class Animal {public void makeNoise() {System.out.println("talk");}//end method makeNoise}//end class Animalpublic class Dog extends Animal {public void makeNoise() {System.out.println("Bark");}/lend method makeNoise}//end class DogWhat would the output of the following be? Explain your answer.Animal animal = new Animal();animal.makeNoise();Dog dog = new Dog();dog.makeNoise();Animal animaldog = new Dog();animaldog.makeNoise();

core concept:- Inheritance :- when a parent class property is reused in its derived class then this…

public void makeNoise() { System.out.println("talk"); }//end method makeNoise }//end class Animal public class Dog extends Animal { public void makeNoise() { System.out.println("Bark"); }//end method makeNoise }//end class Dog What would the output of the following be? Explain your answer. Animal animal = new Animal(); animal.makeNoise(); Dog dog = new Dog(); dog.makeNoise(); Animal animaldog = new Dog(); animaldog.makeNoise();

public void makeNoise() { System.out.println("talk"); }//end method makeNoise }//end class Animal public class Dog extends Animal { public void makeNoise() { System.out.println("Bark"); }//end method makeNoise }//end class Dog What would the output of the following be? Explain your answer. Animal animal = new Animal(); animal.makeNoise(); Dog dog = new Dog(); dog.makeNoise(); Animal animaldog = new Dog(); animaldog.makeNoise();

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Consider the following three Java classes: public abstract class Toy {public void makeNoise() { System.out.println("DEFAULT SOUND"); }} public class Doll extends Toy {public void makeNoise() { System.out.println("Mama!"); }}public class ToyRobot extends Toy {private int volume; public ToyRobot() { this.volume = 5; } public void makeNoise() { System.out.println("BEEP"); } public int getVolume() { return volume; } public void setVolume(int volume) { this.volume = volume; }} Given these classes, determine what will be printed when each of the code snippets below are copied into the following main method at the indicated location. public static void main(String[] args) { Toy toy; Doll doll; ToyRobot robot1; ToyRobot robot2; doll = new Doll(); robot1 = new ToyRobot(); robot2 = robot1; toy = robot1; // INSERT CODE HERE. } A) doll.makeNoise(); ["", "", "", ""] B) toy.makeNoise(); ["", "", "", ""] C)…
Java Programming problem Create a checking account class with three attributes: account number, owner’s name, and balance. Create constructor, getters and setters. If one is to set the initial balance of an account as a negative value in a setter or a constructor, remind the user about the error and set it as 0. Create a CheckingAccountDemo class, and create a main method in which Ask for the name, account number, and initial balance for one account from the keyboard input. With these input values as arguments in a call to the constructor, create a CheckingAccount object. Print the summary of this account that includes information on the name, account number, and balance by calling the getters.
Type a Java method constructor for the "book" Class, which takes values as parameters for all of these attributes.The" book " Class has the following properties: title (string), author (string), year (int), pages (int).
1/ Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000, withdraws $500, withdraws another $400, and then prints the remaining balance. Also print the expected result 2/ Implement a class Employee. An employee has a name (a string) and a salary (a double). Provide a constructor with two arguments public Employee(String employeeName, double currentSalary) and methods public String getName() public double getSalary() public void raiseSalary(double byPercent) These methods return the name and salary, and raise the employee's salary by a certain percentage. Sample usage: Employee harry = new Employee("Hacker, Harry", 50000); harry.raiseSalary(10); // Harry gets a 10 percent raise Supply an EmployeeTester class that tests all methods. 3/Implement a class Car with the following properties. A car has a certain fuel efficiency (measured in miles/gallon or liters/km—pick one) and a certain amount of fuel in the gas tank. The efficiency is specified in…
Given the following class. (JAVA) public class FamilyMember { public String drink( ) {return “cup”;} public String eat( ) {return “fork”;} } Write a Baby class that is derived from the FamilyMember class. The Baby class has an instance variable for the age, a default constructor, and a constructor that accepts an integer. Include any other necessary methods. If a baby is older than 3 years, print that “it eats with its fork”; otherwise, “it eats with its hands”.
*using java* Create a class AnimalCreate a class Cat, and a class Dog, and a class Bearded Dragon which extend Animal. Add to your Animal class: Member: name Methods: Public Animal(String name) //constructor public void makesSound()with the implementation printing out a generic animal sound. Next, override (add) the makesSound()method to your Cat and Dog class, with the implementation specific to each animal (i.e, cat says purr..). Do not override the makesSound() for your Dragon (bearded dragons don’t make sounds!)Note, you’ll also need a constructor in each of your subclasses which calls super(name) to initialize the common ‘name’ member of Animal. --- Next (in your test harness) create a List of different Animals ( a couple cats, a dog, a dragon... ) and add these Animals to your list. Iterate through your list & call makeSound on each. ( you should observe the implementation of the makeSound() method called will be: cat -> from Cat class, dog-> from Dog class,…
class Point with instance variables as: xCoordinate(int) and yCoordinate(int). Write public instance methods (getters & setters) for each instance variable. Now, write a class Circle with private instance variables as radius and Pi (value is 3.14). Write public setter, getter for radius, Area method for calculating Area, Draw method for radius. Formula for calculating area=pi*r^2 Formula for calculating radius=Math.sqrt(xCordinate^2+yCordinate^2) Extend a Circle class from Point class such as Class Circle extends Point Write a Default constructor in Circle class that sets radius, xCoordinate&yCoordinate to some default value e.g. -1; Write a Parameterized constructor in Circle class which takes xCoordinate, yCoordinate and radius as a parameter. E.g. Circle (int xCoordinate, int yCoordinate, double radius) { this.xCoordinate= xCoordinate; this.yCoordinate= yCoordinate;…
The Essay class has a default constructor, a constructor with two parameters, and a constructor with three parameters. Declare the following objects: essay1 with no arguments essay2 with essayTitle and essayAuthor as arguments essay3 with essayTitle, essayAuthor, and essayYear as arguments Ex: If the input is Painting Cole 1919, then the output is: Essay: Undefined, Unspecified, 0 Essay: Painting, Cole, 0 Essay: Painting, Cole, 1919 Archive.java public class Archive { publicstaticvoidmain(String[] args) { Scannerscnr=newScanner(System.in); StringessayTitle; StringessayAuthor; intessayYear; essayTitle=scnr.next(); essayAuthor=scnr.next(); essayYear=scnr.nextInt(); /* Your code goes here */ essay1.print(); essay2.print(); essay3.print(); } } Essay.java public class Essay { private String title; private String author; private int year; public Essay() { // Default constructor title = "Undefined"; author = "Unspecified"; year = 0; }…
Java - Polymorphism 1.Create a class named “Animal” that has the method sound() which prints “Animals make sound.” 2.Create a class named “Cat”, “Dog”, “Pig”, “Rat” which all extends the “Animal” class. 3.Override the sound() method from Animal. These are the sound of the animals: Cat - prints "*meow meow*" Dog - prints "*barf barf*" Pig - prints "*oink oink*" Rat - prints "*squeak squeak*" 4.Call the sound() methods in the same order as stated in #3.
Create a class Animal Create a class Cat, and a class Dog, and a class Bearded Dragon which extend Animal. Add to your Animal class: Member: name Methods: Public Animal (String name) //constructor public void makes Sound () with the implementation printing out a generic animal sound. Next, override (add) the makes Sound() method to your Cat and Dog class, with the implementation specific to each animal (i.e, cat says purr..). Do not override the makesSound() for your Dragon (bearded dragons don't make sounds!) Note, you'll also need a constructor in each of your subclasses which calls super(name) to initialize the common 'name' member of Animal. Next (in your test harness) create a List of different Animals ( a couple cats, a dog, a dragon... ) and add these Animals to your list. Iterate through your list & call makeSound on each. (you should observe the makeSound method called will be: cat -> from Cat class, dog-> from Dog class, bearded Dragon -> from Animal class ) EC:…
Static methods within a class are copied into each object created from the class. true or false java
The following code is in Java: public class Vehicle // Superclass { private double cost; public Vehicle(double c) { cost = c; } (Other methods . . .) // assume these are given and they’re OK. } public class Car extends Vehicle // Subclass { private int passengers; public Car(int p) { passengers = c; } (Other methods . . .) // assume these are given and they’re OK. } 1) What problems are in the code above?2) What is needed to fix the issue of the code?