Write a class about Aeroplane. Obviously, you will require other helper classes to complement your airplane class. Design your classes yourself. The codes should contain the following OOP features implemented in these classes: - Class - Object - Encapsulations - accessor/mutator

Microsoft Visual C#

7th Edition

ISBN:9781337102100

Author:Joyce, Farrell.

Publisher:Joyce, Farrell.

Chapter10: Introduction To Inheritance

Section: Chapter Questions

Problem 20RQ

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C Sharp, I am trying to get my console to display the vehicle information, by using a base class of Vehicle and derived classes Car, and Truck. I have to add an interface to add and remove cars. But for now, I am just trying to get the vehicle information to display from the Car class. For some reason I am not able to override my methods in the derived classes. What am I am doing wrong ? using CarRentalCompany; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CarRentalCompany {//Define an abstract class Vehicle with properties like Make, Model, Year, Status, and Notes public abstract class Vehicle { public string make; public string model; public int year; public string status; public string notes; //Method to Display vechile information public void DisplayVehicleInfomration() { } } public class Car : Vehicle, IRentable {…
Consider this scenario, a mehtod in some class needs to access a data field in another class, here are two possible implementations: public class Process { /* * Check if student qualifies for financial help */ void check(Student student) { //.... } /* * Check if student qualifies for financial help */ void check(double studentGPA) { //.... }} In class Process, which check method you think is better, why? In other words, should we pass the object to the method or just the data member it needs? Disucuss the Pros and Cons of each approach (if any). Assume class Student has a mehod called getGPA( ).
We have two classes, Person and Employee. Both have a field, firstName. We have instances of these objectsPerson p and Employee e. Both p and e have the same value for firstName, specifically, p.firstName = “joe”and e.firstName = “joe” Which of the following statements is necessarily true? Group of answer choices 1. p.equals(e) will return true because they contain the same firstName. 2. We don’t know if either class will have an equals method. 3. There is not enough information to tell what p.equals(e) will return. 4. p.equals(e) will return false but p == e will be true.
Write a class that tests and demonstrates that your Candidate and Electionclasses implement the specification given above. Note that this does not need to be a Junit test class.Your test class must illustrate all of the features that you have implemented. This will best be done by having at least one separate test method for each feature. For instance:• A method that creates a Candidate object and prints out the result of calling each of its accessor (get) methods; • A method that adds a vote to an existing Candidate object.• A method that creates an Election object, creates a few Candidateobjects and adds them to it, and then calls the printAll method;• A method that finds a matching Candidate;• A method that does not find a matching Candidate;• etc.Note that the list above is not a complete list of the test class’s methods and you will need to define more than those for this part. It will be worth writing this test class alongside writing the other classes. For instance, develop the…
For this exercise, you are given a Team superclass with a BaseballTeam and FootballTeam subclass. Take a moment to examine these classes and the instance variables and methods in each. In the TeamTester class, you will see three objects declared and instantiated using the Team, FootballTeam, or BaseballTeam classes. For each object, use a print statement to print out any public method that returns information that is available for that particular object, including the toString. For example, the dolphin object is a FootballTeam object. One of the pieces of information that can be printed is the getTies() method, so you will call that method in your TeamTester file: System.out.println(dolphins.getTies()); Do this for all the methods that each of the objects can call. Hint: Remember, for the program to compile and run, Java looks for methods to exist in certain classes. ================================= public class Team { private String name;private String location;private int…
Please write the Java code for a Phone class that represents a mobile phone, as detailed below: It should have instance variables (attributes) for make, model, color (all stored as Strings) and capacity (stored as int: the storage capacity in GB) Please define one constructor with parameters for all those attributes. The Phone class will be immutable, except its storage capacity can be changed. So please write only one mutator method, called .setCapacity. Please write accessor methods for each instance variable. Please write a .toString() method to display all the Phone's information. Please write a .equals method to compare two Phone objects, returning true if all their attributes are the same. Finish the Jave program to show the outputs bellow: Code: class Main { public static void main(String[] args) { Phone craigPhone, bettoPhone, tobyPhone; craigPhone = new Phone("Samsung", "Galaxy S21 5G", "Phantom Violet", 256); bettoPhone = new Phone("Apple", "iPhone 13 Pro",…
Say we have a collection of animal classes, with each class represents a kind of animal. They all share a common ability of “speak”. Dog speak in the way of “Woof! Woof!”, cats speak in the way of “Meow! Meow!”, etc. In order to capture this common characteristic, we need an interface named Speakable: public interface Speakable { // put the method header here } Think about what method is needed for the Speakable interface? (what method can describe the speakable feature? ) We simply need one method speak() to print out the way that the animal “speaks”. Put the method header in the interface body. This method does not take any parameter and does not return any value. Be reminded that you only need to put the method header with a semicolon (abstract method) into the interface. BE NOTED: Adding an interface is different from adding a class. You need to click File tab -> New -> Interface, to add an interface file to the project. Now download Cat.java. Have them implement the…
Say we have a collection of animal classes, with each class represents a kind of animal. They all share a common ability of “speak”. Dog speak in the way of “Woof! Woof!”, cats speak in the way of “Meow! Meow!”, etc. In order to capture this common characteristic, we need an interface named Speakable: public interface Speakable { // put the method header here } Think about what method is needed for the Speakable interface? (what method can describe the speakable feature? ) We simply need one method speak() to print out the way that the animal “speaks”. Put the method header in the interface body. This method does not take any parameter and does not return any value. Be reminded that you only need to put the method header with a semicolon (abstract method) into the interface. BE NOTED: Adding an interface is different from adding a class. You need to click File tab -> New -> Interface, to add an interface file to the project. Now download Dog.java. Have them implement the…
What does the super keyword represents and where can it be used? Give an example of a superclass and subclass. Be sure to make all the instances variables of the super class private. Include at least one constructor in each class and ensure that the constructor of the subclass calls the constructor of the superclass. Also include a toString method in both classes that returns the values of the instance variables with appropriate labels. Ensure that the toString method of subclass calls the toString method of the superclass so that the string returned contains the values of all the inherited instance variables.
Write a full class that represents a Phone, described by a name, price, and then whether the phone comes enabled with Bluetooth. The default value is that most phones come enabled. Include instance data, one or more constructors, getters and setters, a toString, and an equals method. Required validation for the variables Implement the Comparable interface. Order phones based on name and then price. Show make the driver in a different class to test the methods using user-input
We have a parking office class for an object-oriented parking management system using java Add (implement) a method to the Parking Office class to return a collection of permit ids (getPermitIds) I have attached two class diagrams with definitions of all related classes in our system (i.e car, customer, .....). N.B. Parking office methods in the class definition like register, getcustomer and addcharge have already been implemented, we just need an additional getPermitIds method as mentioned above
I have provided you with 3 interfaces (HasLegs, HasWings, and BreathesUnderwater) and a Tester class. I want you to create 6 new classes: • 2 that implement HasLegs • 2 that implement HasWings • 2 that implement BreathesUnderwater For each of the classes, you will have to implement the methods that the interface dictates. In addition, override toString so that it prints out a simple message describing what the object is. See the example output of my implementation below for an idea how to do that. The Tester class creates 3 ArrayLists, one for each interface. It also loops through each ArrayList and prints out its contents using toString and the interface methods. In between those two chunks of code, you’ll see a //TODO: comment. It is there that I want you to create one object for each of the 6 classes you created and add that object to the appropriate ArrayList. Once you have done all that, you should be able to run your program and see output like the following: I am a table. I have…