Create a Dog and a Cat class, each of which inherit from Animal. Each class should have a constructor which initialses their name and a hello method. The cat's hello method should return the string "Meow" and the dog's hello method should return the string "Woof". The Animal class is public abstract class Animal { public Animal(String n) name = n; } abstract String hello(); public String greeting() { return hello() + ", I am " + name; } // private private String name; } Your classes will be used in the following Main class. public class Main { public static void main(String () args) { Animal cat = new Cat("Angel"); Animal dog = new Dog("Fido"); System.out.println(cat.greeting()); System.out.println(dog.greeting()); } Note that your Cat and Dog classes must not supply a greeting method. They should use the greeting method from the Animal class.

Create a Dog and a Cat class, each of which inherit from Animal. Each class should have a constructor which initialses their name and a hello method. The cat's hello method should return the string "Meow" and the dog's hello method should return the string "Woof". The Animal class is public abstract class Animal { public Animal(String n) name = n; } abstract String hello(); public String greeting() { return hello() + ", I am " + name; } // private private String name; } Your classes will be used in the following Main class. public class Main { public static void main(String () args) { Animal cat = new Cat("Angel"); Animal dog = new Dog("Fido"); System.out.println(cat.greeting()); System.out.println(dog.greeting()); } Note that your Cat and Dog classes must not supply a greeting method. They should use the greeting method from the Animal class.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: Write a Hamster class that is a subclass of Pet. Include: an additional attributes called…

A: A class is a group of objects which have common properties. A constructor is a method that is used…

Q: The picture is code tester public class WordVowels { // Step 2: Declare an instance variable to…

A: ================================================== Here is the Word.java class…

Q: write in Java Using JOptionPane.showInputDialog Design an abstract class named BankAccount to hold…

A: Here's a possible implementation of the BankAccount and SavingsAccount classes in Java…

Q: In blue J add a no argument constructor for the constructor of the code below: public class Book {…

A: We need to add a no argument constructor for the constructor of the given code. We have assumed…

Q: Which type of relationship is depicted between Student and School?

A: Which type of relationship is depicted between Student and School?public class Student {private…

Q: write in Java Using JOptionPane.showInputDialog Design an abstract class named BankAccount to…

A: In this question we have to code in java for the implementation of the abstract class BankAccount in…

Q: We have two classes: class Animal { } public void eat() { } | } class Cat extends Animal { @Override…

A: According to our guidelines, we are allowed to solve only the question. Please post the other…

Q: 1 Description of the Program In this assignment, you will make two classes, FullTime Employee and…

A: As per the given question, given the Employee class, we need to implement FullTimeEmployee,…

Q: public class Bicycle { public int cadence; private int gear; protected int speed; int id; public…

A: Here is the explanation:

Q: Java programming language I need the two classes ( the testing class and the class with the…

A: We can merge both the classes in one (testing and method class) . We can use main method the…

Q: public class Team { private String name; private int wins, int losses; public…

A: Program Approach: In the given code a class "Team" is declared that defines one string "name"…

Q: Write a compareTo () method for this Student class. public class Student { private String name;…

A: compareTo(): method is used to compare to objects inputs to this method is: the object that you have…

Q: Design a class Expression { public: //methods... private: string infix; string postfix; }; that…

A: The `Expression` class in this C++ software enables users to manipulate and evaluate arithmetic…

Q: For the Employee class, create the following: A private String instance variable m name. A private…

A: Screenshots of the code: 1.

Q: Consider the following class defintion for class named MyClass and answer the following questions.…

A: The syntax for creating object of the class is as follows: 1. For default constructor Classname…

Q: i have a parent class called Person containing the name and ID number of students and i need to…

A: Here I have defined the class named Student. While defining the class I have used extend keyword to…

Q: Java program: 1. Write a PaypalAccount class to include both balance and accountID as the instance…

A: Actually, Java is a programming language originally developed by James Gosling at Sun Microsystems…

Q: Consider the following class Time, which represents a time using three ints for hour, minute and…

A: #include <iostream>using namespace std; class Time { private: int hour; int min; int sec;…

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: The BankAccount class models changes to the balance of a person’s savings account.

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

Q: Given the following code, which statement is correct? class Coffee ( } class Sugar { } class Cup {…

A: Composition class: As inheritance composition class is used for reusing the code. The composition…

Q: It has just one Main class which tests abstract class Animal and its 3 subclasses: Dog, Cat, and…

A: //declaring interfacepublic interface Talker{ //declaring abstract methods public void…

Q: // WRITE YOUR CODE BELOW TO MAKE THIS CLASS // WORK WITH MAIN TO PRODUCE THE OUTPUT SHOWN THERE.…

A: 1. The showCurtime() will display time in h:min format using the toString method. 2. compareTo()…

Q: The Animal class has a default constructor with no parameters. Define a public overloaded…

A: The objective of the question is to define an overloaded constructor for the Animal class that takes…

Q: Complete the partial declaration of Class Car: public class Car { // declare three…

A: this keyword takes value from current object of instance variables. A setter method is always of…

Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

Create a Dog and a Cat class, each of which inherit from Animal. Each class should have a constructor which initialses their name and a hello method.
The cat's hello method should return the string "Meow" and the dog's hello method should return the string "Woof".
The Animal class is
public abstract class Animal
{
public Animal(String n)
{
name = n;
}
abstract String hello();
public String greeting()
{
return hello() + ", I am
+ name;
}
// private
private String name;
}
Your classes will be used in the following Main class.
public class Main
{
public static void main(String [] args)
{
Animal cat = new Cat("Angel");
Animal dog
= new Dog("Fido");
System.out.println(cat.greeting());
System.out.println(dog.greeting());
}
}
Note that your Cat and Dog classes must not supply a greeting method. They should use the greeting method from the Animal class.

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 Main.java

Step 4 Animal.java

Step 5 Sample output

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 1 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

1. Define a Class: Circle Circle - radius: double + Circle() +Circle(double r) +setradius(double r): void +getradius() : double +calculateArea(): double +calculateCircumference: double 2. Use a Circle instance (object) in a main() method Program.
Consider the following class Date, which represents a date using three ints for month, day and year: class Date { private: int month; int day; int year; public: Date() { month = day = year = 0; } Date(int m, int d, int y) { month = m; day = d; year = y; } bool operator==(Date); bool operator<(Date); }; Write an implementation for both overloaded operators. == should return true if the Date objects are equivalent and false if not. < should return true if the Date of the calling object (left object) comes before the parameter Date object (right object) and false if not. You may assume that all objects of class Date are valid, i.e. month is between 1 and 12, inclusive; day contains an appropriate day for the given month, and year can be anything. You do not need to demonstrate calling these operators.
An instance of an abstract class is made by using the keyword 'new'. true or false
Consider the following class definition and answer the following questions: public class MyClass { I/fields private int x; private int y; llconstructors public MyClass() {x = 0; y = 0; } public MyClass(int a, int b) {x = a; y = b; I/methods public void ShowNumbers() { System.out.printin(x + y); public void setx(int a) { x = a; public void sety(int b) {y = b; public int getx() { return x; public int gety() { return y; public int getsum() { return (x + y); } public int getproduct() { return x*y; Give the outputs of the following segments written in the main method: a) MyClass Object1= new MyClass(12, 15); System.out.printin(Object1.getx() +* *+ Object1.gety(); b) MyClass Object2= new MyClass( ); Object2.setx(5); Object2.sety(8); Object2.ShowNumbers( ); System.out.printin(Object2.getsum() + +Object2.getproduct());
The weight of an object can be described by two integers: pounds and ounces (where 16 ounces equals one pound). Class model is as follows: public class Weight { private int pounds; private int ounces; public Weight(int p, int o) ( pounds=p+o/16: ounces = 0% 16: } Implement a method called subtract, which subtracts one weight to another. i.e. Weight w1 = new Weight(10.5): Weight w2 = new Weight(5.7): Weight w3= w1.subtract(w2):
Given the following class definition: class Point2d { private int x, y; public Point2d () { X = 0; y = 0; } public Point2d (int i, int j) { X = i; y = j; } public void SetX (int i) { x = i; } public void SetY (int j) { y = j; } public int GetX () { return x; public int GetŸ () { return y; } public String toString() { return '[' + x + ", } + y + ']'; } } Use inheritance to create a class, Point3d, with any additional appropriate data and/or functions.
Given the following class definition,public class Pen{ private String name; public Pen(String n) { name = n; } @Override public String toString() { return this.name + "-"; }}public class Brush extends Pen{ private int ink; public Brush(String n, int m) { super(n); ink = m; } @Override public String toString() { return super.toString() + this.ink + "-"; }}What is the output of the following program? Brush fluffy = new Brush("Fluffy", 5); System.out.print(fluffy);If there is no output, please specify "nothing" (no quotes) in the blank for the output. No hand written and fast answer with explanation
1. Design a new Triangle class that extends the abstract GeometricObject class. Write a test program that prompts the user to enter three sides of the triangle, a color, and a Boolean value to indicate whether the triangle is filled. The program should create a Triangle object with these sides and set the color and filled properties using the input. The program should display the area, perimeter, color, and true or false to indicate whether it is filled or not.
Consider the following design for a Product class that keep track of product inventory: public class Product { public Product(String name, double qty){} public double getQty(){} public void reduce(double qty){} public void increase(double qty){} private String prodName; private double qtyOnHand; /* Data */ } Write the code for a main() method that models the following: A grocer starts the day with 50 Hard Rolls and 25 Soft Rolls. She sells 20 Hard Rolls and 10 Soft Rolls. The next morning about half of the Soft Rolls have turned into Hard Rolls. A shipment of 50 Soft Rolls comes in. She sells 30 Soft Rolls and 20 Hard Rolls. The storeowner wants a printout telling how many of each product she now has on hand.
Consider the following class public class Ketchup extends Food implements Tasty{ public String brand; private Snack snack; } Select ALL that are correct based this class. Ketchup is a Food Ketchup is a Tasty Ketchup is an Object Ketchup is a Snack Food is a Tasty Snack is a Tasty Food is a Snack
Consider the following classes: public class Animal { public Animal(String itsName) { name = itsName; } public void setName(String itsName) { name = itsName; } public String getName() { return name; } private String name; } public class Dog extends Animal { public Dog(String itsName) { super(itsName + “Dog”); sound = “Bark!”; } public void setSound(String itsSound) { sound = itsSound; } public String getSound() { return (getName(0) + sound); } public String getName(int choice) { if(choice > 0) return super.getName(); else return “AnyDog”; } public String getName() { 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[] args) { Animal a1 = new Animal(“Tweety”); Animal a2 = new Dog(“Rover”); Dog d1 = new Dog(“Spot”); . . . . } Give the values of the following expressions. If an expression is erroneous,…
public 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 (cyls