Polymorphism - abstract class Banking Account class. Create an application with an abstract class called Account with an abstract method calculateInterest, derive the following three classes from Account class 1. SBAccount 2. DAccount 3. FDAccount Implement the abstract method in these classes; Invoke these methods from the main method using the reference of BankingAccount class

Polymorphism - abstract class Banking Account class. Create an application with an abstract class called Account with an abstract method calculateInterest, derive the following three classes from Account class 1. SBAccount 2. DAccount 3. FDAccount Implement the abstract method in these classes; Invoke these methods from the main method using the reference of BankingAccount 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

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QUESTION 16 What must be true of a class with one abstract method? O The class must also implement the Iterable interface Any derived class must implement the method The abstract method must have the static modifier O The method cannot specify a return value QUESTION 17 Suppose we wanted to design a set of classes for a veterinarian's office. Our Customer class looks like this: public class Customer { Pet [] pets; } Select all the statements that are true Once the size of the pets array has been set, it cannot be changed Because we're using an array, all pets must be the same A customer must have at least one pet We also need to declare a Pet class QUESTION 18 What is the proper use of an enumeration? To define a set of ordered values To enforce the use of the Comparable interface O To define, or enumerate, the values returned by a Random object generator O To define the classes in an inheritance hierarchy
Inheritance, Polymorphism, ArrayLists, Throwing Exceptions The UML diagram below shows a set of classes designed to represent a music collection from 1995. The constructors and methods all function in the standard way, except: The equipmentRequired method should return “Record Player” or “CD Player” as appropriate.The getAlbum method of the NinetiesMusicCollection class accepts an index and returns the corresponding Album object. This method throws an IllegalArgumentException if the index is out of range. (This is the only exception you have to throw anywhere in your code.)In the NinetiesMusicCollection constructor, you can assume the ArrayList<Album> object passed as an argument is not null . Don’t worry about privacy leaks.Implement this set of classes in Java. Note the italics on the Class name “Album” and the method name “equipmentRequired” in the Album class.
Implement a nested class composition relationship between any two class types from the following list: Advisor Вook Classroom Department Friend Grade School Student Teacher Tutor Write all necessary code for both classes to demonstrate a nested composition relationship including the following: a. one encapsulated data member for each class b. inline default constructor using constructor delegation for each class c. inline one-parameter constructor for each class d. inline accessors for all data members e. inline mutators for all data members
When a concrete class inherits from an abstract class, you have to implement all abstract methods declared in the super class before you can instantiate it (the concrete class). True False
Write a program in java for the following scenario and write a DriverQ class to test your construction: i) Create a class Vehicle which has the following members: Member Variables: • vehicleNumber • ownerName • mulkiaAmt insuranceAmt Member Methods: A constructor to initialize the vehicleNumber, ownerName, mulkiaAmt and insuranceAmt. An abstract method calcDiscount() to calculate and return the discount amount. An abstract method calcTotalAmt() to calculate and return the amount to be paid. • A display( ) method to display the details of the vehicle. ii)Create a subclass PetrolVehicle which is inherited from Vehicle class and has the following details: Member Variables: • serviceCharges Member Methods: A constructor which will invoke the super class constructor and initialize serviceCharges. • Implement the calcDiscount() method to calculate the discount as, Service Charges Discount 0- 50 1.000 50 - 75 75 - 90 2.000 3.000 90 - 100 4.000 Implement the calcTotalAmt() method to calculate…
Design and implementation of Java (Draw UML) classes 1. Design a class named Bill to represent a square. 2. The class contains: • One data field called “Items” that defines the number of items. Another double data field called "price" defines the price. The default is 1.0. • no-arg constructor • constructor with parameters to create the invoice • method called getBill () that returns the item and price duplication. 3. Create a class and test a class (create three different objects and print the values of the variables and method)
1). Write a java abstract class called Solid and you will derive two classes – Cylinder and Sphere – from Solid. The class Solid Member variables type whose data type is String. For example, the type could be sphere, cube, parallelepiped. 2). The methods should include: A default or null constructor A constructor that initializes the value of type Getters and Setters An abstract method to find volume whose signature is public abstract double findVolume(); An abstract method to find surface area whose signature is public abstract double findSurfaceArea() a toString method that returns a string like the following Solid Type: Sphere an equals method that returns true if two Solid objects have the same type and false otherwise. 3). The class Cylinder - Cylinder will extend Solid Member variables: Cylinder inherits type from Solid radius of type double height of type double Methods: a default or null constructor a constructor that initializes type, radius, and height. type will always…
Given the following super class and subclasses: public abstract class ThemePark String name: // customer's name String icNo: // customer's identification card number boolean member: // either member or nonmember of the // theme park //Methods: //default and normal constructor //accessors //toString0 public abstract double calCharges0: //calculate the charges public class WaterPark extends ThemePark String activity: // surfBeach,waterRide or other //Methods: //default and normal constructor //accessors /toString0 public double calCharges) . public class WildlifePark extends ThemePark String category: //child or adult I/Methods: //default and normal constructor //accessors /toString) public double calCharges) .) b) Write code fragments in the application / driver class that can perform the following tasks: (Assume all relevant methods have been defined in all classes involved) ii) Assuming data has been stored in this tp array, calculate and display the total charges of every WaterPark…
Declare and implement an Employee class for the payroll system: 4.1 Declare a class that meets the scenario requirements. Ensure that the method that compares the two objects receives objects of the Employee class and returns an int. 4.2 Implement the class methods on the same code as the class declaration 4.3 Write a main function in the same code and test the payroll system. Use the parameterised constructor to create the two objects and then test the method that compares the two and display a message that states which employee earns more than which employee.
Code: import java.util.*; //Bicycle interface interface Bicycle { abstract void changeCadence(int newValue); //will change value of candence to new value abstract void changeGear (int newValue); //changes gear of car abstract void speedUp(int increment); //increments speed of car by adding new Value to existing speed abstract void applyBrakes(int decrement); } //ACMEBicycle class definition class ACMEBicycle implements Bicycle { int cadence = 0; Â Â int speed = 0; Â Â int gear = 1; //methods of interface public void changeCadence(int newValue) { this.cadence=newValue; } public void changeGear (int newValue) { this.gear=newValue; } public void speedUp(int increment) { this.speed+=increment; } public void applyBrakes(int decrement) { this.speed-=decrement; } //display method void display() { System.out.println("Cadence: "+this.cadence); System.out.println("Gear: "+this.gear); System.out.println("Speed: "+this.speed); } } //KEYOBicycle class definition class KEYOBicycle implements…
The Critter class is a base class with some basic functionality for running simulations of different kinds of critters. Critters can move, act, and remember their history. A typical simulation contains a number of critters of different types. In each step of the simulation, the act member function will be called on each critter. Define a class Sloth derived from Critter that simulates a sloth. Sloths alternate between eating and sleeping. Add the word "eat" or "sleep" to the history each time the act function is called. The implementation of the Critter class is not shown. Complete the following file: sloth_Tester.cpp #include <iostream>using namespace std; #include "critter.h" /**A sloth eats and sleeps.*/class Sloth : public Critter{public:Sloth();. . .private:. . .}; Sloth::Sloth(){. . .} void Sloth::act(){if (...) {add_history("eat");...}else{add_history("sleep");... }} int main(){Sloth sloth;sloth.act();cout << sloth.get_history() << endl;cout <<…
Design a Class Customerinsurance that implements Customer and Insurance interfaces, The Customer Class has the customers' details and abstract functions getoustomer().setCustomer(). The Insurance interface has the details of policy name, yearly premium amount and abstract functions get getpolicy(), Setpolicy() The Customer insurance class get the policy name payment type (quartery, hall yearly, yearly) of the customer and calculate the policy amount to be paid Write only in Java