A class Pet is the superclass of the class Dog. The Dog class has a fetch() method defined, but the Pet class does not. Does the following code compile? If not, how can it be modified so that it will compile? Pet p = new Dog(); System.out.println(p.fetch());

A class Pet is the superclass of the class Dog. The Dog class has a fetch() method defined, but the Pet class does not. Does the following code compile? If not, how can it be modified so that it will compile? Pet p = new Dog(); System.out.println(p.fetch());

Microsoft Visual C#

7th Edition

ISBN:9781337102100

Author:Joyce, Farrell.

Publisher:Joyce, Farrell.

Chapter9: Using Classes And Objects

Section: Chapter Questions

Problem 19RQ

See similar textbooks

Related questions

Q: public interface Rational { /** * Determines whether this Rational object represents a value less…

A: I give the code in Java along with output and code screenshot

Q: Modify the method beginsWithVowel. Use a different way to implement the method (try method indexOf()…

A: Updated Driver class import java.util.*; public class PigLatin { public static void…

Q: Java - Access Specifiers Create a class named Circle that has attributes radius, area, and…

A: formulas to calculate the circumference and area: c = 2πr and A = πr² .

Q: Description: Create a class named ComparableDog that extends Animal and implements Comparable…

A: Find the required code in java given as below and output :

Q: e T1 name; e T2 stulD; е Т3 CGPA; void setStuD:

A: Ans- public void setStuData(String n,int d,double g) System.out.println(name+" "+stuID+"…

Q: private float c; private void method2(double y) { c = y; } in another class we created an object…

A: A programming language is a formalized set of instructions used to communicate with a computer and…

Q: der: 5 Automobile happens if you try Automobile();

Q: Dynamic Apex: Write test class for this apex code(Not required the output) You are working on the…

A: As per the given question we are required to develop a test class for the given Apex code. First…

Q: Homestay Booking Application User Log in Type of House with price No Check Date? Yes No Yes Proceed…

A: According to bartleby guidelines we need to answer the first question only, please repost the second…

Q: abstract class A{ int a; int b; abstract void methodA(); class B extends A{ int a; void methodA(){…

A: Objective: Two questions are given on java inheritance and abstract class or method characteristics.…

Q: The class diagram below shows an Order class that "has a" Customer and zero or more Items. Order…

A: The class diagram below shows an Order class that "has a" Customer and zero or more Items. Order…

Q: Dynamic Apex: Write test class for this apex code(Not required the output) You are working on the…

A: Our task: The question is based on the Dynamic apex in which we have to initialize the sobject and…

Q: oublic class MyGenClass { private T1 name; private T2 stulD; private T3 CGPA; public void…

A: SUMMARY: - Hence, We discussed all the points

Q: Define the body of getStudentWithMinAverage method that shall return the student object from…

A: import java.util.ArrayList; public class Main{ public static void main(String[] args) {…

Q: Assume an Animal class defines a public eat method and a Dog class derived from the Animal class…

A: Two classes are given : Animal class and a Dog class derived from the Animal class Animal[] animals…

Q: Class PassengerList has/should have the following members: - A list of valid PNR numbers pnrList as…

A: JAVA CODE: import java.util.*;interface IPassengerInfo{ public void printName();} class…

Q: Python: Please read the following. The Game class The Game class brings together an instance of…

A: Here is the approach : First create the class Game . Then create the __init__ method to initialize…

Q: public float method1(int z) { return (float) z; } // in another class we created an object of the…

A: Programming languages can be categorized into high-level languages, which are closer to human…

Q: public class Test1 { private static int index = 0; public int x; Test1(){ index ++; } public static…

A: Encapsulation is an object oriented programming concept which is to provide more security for the…

Q: private int b; public int method3() { return b; } // in another class an object of the first…

A: Algorithm:Create a class named FirstClass with a private integer variable b.Inside FirstClass,…

Q: Create a class Animal Create a class Cat, and a class Dog, and a class Bearded Dragon which extend…

A: We need to write a Java code for the given scenario.

Q: Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two…

A: Algorithm: 1. Create a class called Fibonacci with a public static method called getValue. 2. This…

Q: / * * * The VideoTapeclass holds information about a single television programme recorded on a video…

A: The class is a user-defined data type in which it wraps data members and member functions. The class…

Q: Given main(), define a Course base class with methods to set and get private fields of the following…

A: Algorithm for the Course Information Program:Create a class named Course with private fields…

Q: Task 3: Implement method setup in PE1 class. The description of what is wanted is given in the…

A: java language Java programming is supported by the platform. There are several Java programming APIs…

Q: Complete the Kennel class by implementing the following methods: addDog(Dog dog) findYoungestDog()…

A: Add the dog at the end of the array in addDog method In findYoungestDog method, we need to iterate…

Q: You are required to develop a small chatting application where two or more friends can communicate…

A: Answer: I have done code and also I have attached code as well as code screenshot.

Q: In Python, #Create a basket class, which has a class/static attribute pricelist (string/float…

A: Hello student, hope you are doing good. In this question, we need to write a python code using…

Q: Write the definitions of the member functions of the classes arrayListType and…

A: Introduction: The meaning of the question is to ask for the definitions of specific member…

Q: Make a class Class (as in a class of students, not a class as in a class of objects) that stores…

A: I've written a code in python to input the no. of students by the user and calculate the passing…

Concept explainers

Random Access

Random access is generally known as direct access. Random access is the capability to have access to any item from a given population of elements at random. Sequential access is the direct opposite of random access. In random access, the elements can be retrieved irrespective of the location. In order to move from point A to Z, you can just jump to point Z in random access system. The disk is an example of random access.

Question

100%

A class Pet is the superclass of the class Dog. The Dog class has a fetch() method defined, but the Pet class does not.

Does the following code compile?

If not, how can it be modified so that it will compile?

Pet p = new Dog();

System.out.println(p.fetch());

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

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

private float c; private void method2(double y) { c = y; } in another class we created an object of the first class then within in it : tester.method2 (10.0f); are there any errors ? how many errors if there are any and with explanation please.
class Param3 { public int x; private void increase(int p) { x = x*p; } public void calculateX(int y) { increase(y); } public int getX() { return x; } } // in another class Param3 q3 = new Param3(); q3.x = 5; q3.calculateX(7); System.out.println(q3.getX()); what would be the answer for the last two lines ? also above were x = x*p do both x in here are the fields? wouldn't that be cnofusing?
In Python, #Create a basket class, which has a class/static attribute pricelist (string/float dictionary - you can hardcode this) #The constructor should set the name to the name passed as a parameter and initialise the contents (empty) #You should provide an addItem method taking product,quantity which adds this to the contents #and a getQuantity method taking a product, which returns the relevant quantity
Dynamic Apex: Write test class for this apex code(Not required the output) You are working on the project in which you have to create the apex code in which your task is to define the objects dynamically by using the method argument which is api name in string and a map of string, string as a key value pair. Class Code: public static void modifySobjectData(String str , Map mapofString) { //Retrive the type of Sobject by using the getGlobalDescribe Schema.SobjectType targetType = Schema.getGlobalDescribe().get(str); //Initalize the Object Sobject newobject = targetType.newSobject(); for (String s :mapofString.keySet() { newobject.put(s, mapofString.get(s)); } System.debug('newObject' + newobject); //Perform the DML if(targetType != null) insert newobject; } }
Complete the Kennel class by implementing the following methods: addDog(Dog dog) findYoungestDog() method, which returns the Dog object with the lowest age in the kennel. Assume that no two dogs have the same age. Given classes: Class LabProgram contains the main method for testing the program. Class Kennel represents a kennel, which contains an array of Dog objects as a dog list. (Type your code in here.) Class Dog represents a dog, which has three fields: name, breed, and age. (Hint: getAge() returns a dog's age.) For testing purposes, different dog values will be used. Ex. For the following dogs: Rex Labrador 3.5 Fido Healer 2.0 Snoopy Beagle 3.2 Benji Spaniel 3.9 the output is: Youngest Dog: Fido (Healer) (Age: 2.0)
Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers. For example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on… For this, you will implement a class that takes a positive integer (n) and returns the number in the nth position in the sequence. Examples When n is 1, the returned value will be 0. When n is 4, the returned value will be 2. When n is 9, the returned value will be 21. come up with the formula and base cases Implementation Create a class Fibonacci with a public static method getValue. Create a Main class to test and run your Fibonacci class.
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:…
2. Using Encapsulation concept for Test1 class. package Exam; public class Test1 { private static int index = 0; public int x; Test1(){ index ++; } public static int getlndex () { return index; } public void prints(){ System.out.println("Hi Students!"); } } public class Test2 extends Test1 { @Override public void prints(){ System.out.println("OOP!"); } } public class Main { public static void main(String[] args) { } }
Assume an Animal class defines a public eat method and a Dog class derived fromthe Animal class defines a different public eat method. And assume thedeclaration:Animal[] animals = {new Animal(), new Dog("Collie", "brown")};Indicate which eat method is invoked by each of the following statements, and explainwhy.animals[0].eat();animals[1].eat();
public class MyGenClass { private T1 name; private T2 stulD; private T3 CGPA; public void setStuData( ){ I/ parameters name = n; stulD = d: CGPA = g; } public void printAsString() { System.out.println( } ); I/ print all information as string public static void main(String args||) { Il Create an object stu by parameters String, Integer, Double Il Call setStuData() with any values you like /l Call printAsString() } }
For the programming language Java
g) Make a class Class (as in a class of students, not a class as in a class of objects) that stores several Student objects. Store a list of students in an attribute called students. The initializer method should initialize the class as an empty class (no students). Implement a method add_student() that takes an object of class Student and adds it to class. Implement method pass_rate() that determines the fraction of students that pass the class (have a grade of >= 6). python code!!