StarShip# Color bodyColor+ StarShip()+ void move( int )+ setColor( )FederationStarShip# int RegNumber# int weight+ FederationStarShip()+ void setReg( int)+ int getWeight ( )+ void setWeight( )+ setColor( Color )GalaxyClassStarShip# int weaponLoad+ GalaxyClassStarShip( )+ void move( int )+ void firePhaser()1. Based on the diagram above, which is the correct declaration for the classFederationStarShip?2. Based on the diagram above, the FederationStarShip class definition should contain apublic method named, getWeight. Which classes can execute this method?3. Based on the diagram above, the StarShip class should contain an instance variabledeclaration, protected Color bodyColor; which classes that are able to access thisvariable.

FederationStarShip is a class which is deriving StarShip class and this this class declaration will…

Answered: 1. Based on the diagram above, which is…

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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Write a program using the following hints in Superclass.a) Declare the field years with its suitable data types and assign that field to the age. b) Create an accessor method to return the years. Write a program using the following hints in Superclass. a) Declare the field years with its suitable data types and assign that field to the age. b) Create an accessor method to return the years.
Let’s assume you are creating a game where multiple players are involved. You will create a Player class that will allow you to later create Player objects. Each player will need a name, a health level, a super power, and number of lives remaining. In your Player class we need the following: Four private data members: name (a String) health (an int) power (a String) lives (an int) Three Constructors: A constructor that has no parameters and sets name to “No Name”, health to 100, power to “Nothing”, and lives to 3.A constructor that takes in two parameters – a String for the name and a String for the power. The health variable should be set to 100 and the lives variable should be set to 3 by default. A constructor that takes in all four parameters and sets them. Accessors and Modifiers (8 total): Create an accessor/getter for all four private data members. Create a modifier/setter for all four private data members. toString() method Create a toString() method that neatly displays the…
How do I create a class Battle, with the following instance attributes: iron_chef: a Chef object challenger: a Chef object secret_ingredient: a string (the ingredient to be used by the chefs in this battle) dishes: a list of Dish objects outcome: an empty string The Battle class should also have the following instance method: conclude: Make the critics rate the dishes in the battle, and then set the outcome attribute to either 'iron_chef', 'challenger', or 'tie' based on the results. (Whichever chef gets a higher total rating across all dishes is declared the winner.) BELOW IS THE CODE I HAVE -------------------------------------- class Battle: def __init__(self, iron_chef, challenger, secret_ingredient, dishes, outcome=''): '''(Chef, Chef, string, list, string) -> Battle''' self.iron_chef = iron_chef self.challenger = challenger self.secret_ingredient = secret_ingredient self.dishes = dishes self.outcome = outcome def…
Create a Puppy class with private property color and both a getter and a setter for that property called getColor and setColor. The constructor should take a parameter to initialize the private property. 1
1. Create a class called Elevator that can be moved between floors in an N-storey building. Elevator uses a constructor to initialize the number of floors (N) in the building when the object is instantiated. Elevator also has a default constructor that creates a five- (5) storey building. The Elevator class has a termination condition that requires the elevator to be moved to the main (i.e., first) floor when the object is cleaned up. Write a finalize() method that satisfies this termination condition and verifies the condition by printing a message to the output, Elevator ending: elevator returned to the first floor. In main(), test at least five (5) possible scenarios that can occur when Elevator is used in a building with many floors (e.g., create, move from one floor to another, etc.). Hint: Termination occurs when the instance is set to null. You may wish to investigate “garbage collection” for this exercise. When solving this problem make sure that the user can interact with the…
1.How do we gain access to private attributes outside of the class they are defined? Through public methods Through static methods Through private methods Through the class identifier 2. If you were designing a class called Point and the class had a static variable or function, which of the following would either define or use it correctly? self.x = x self.increaseNumPoints() def mystery(self, x, y): Point.numPoints += 1 3.To promote security and object ecapsulations, object attributes should be declared as: static protected private public 4. Two underscores ( __ ) will precede: public attributes private attributes public methods private methods Both public attributes and methods both private attributes and methods 5. Which of the following is required in a class to create unique…
Which of the following are true? If we derive a class from an abstract class, we can select which methods we choose to implement in our derived class. Abstract classed cannot have concrete methods. We can declare an instance of an abstract class. All of the above statements are false.
This is the question - Create an abstract Student class for Parker University. The class contains fields for student ID number, last name, and annual tuition. Include a constructor that requires parameters for the ID number and name. Include get and set methods for each field; the setTuition() method is abstract. Create three Student subclasses named UndergraduateStudent, GraduateStudent, and StudentAtLarge, each with a unique setTuition() method. Tuition for an UndergraduateStudent is $4,000 per semester, tuition for a GraduateStudent is $6,000 per semester, and tuition for a StudentAtLarge is $2,000 per semester. Code I was given - public class GraduateStudent extends Student { public static final double GRAD_TUITION = 6000; public GraduateStudent(String id, String name) { // write your code here } public void setTuition() { tuition = GRAD_TUITION; } } public abstract class Student { private String id; private String lastName;…
2. Create another class named testRoom that uses the above class. This class should have a main() method that behaves as follows: 1. Create two instances of the Pay class: Motel Six that uses the default constructor, and Ramada that creates an instance with $550 as the price of a room. 2. Change the price of the Motel Six room to $265. 3. Change the amenities for the Ramada to $240. 4. Calculate the total cost for both instances. 5. Display the standard room fee, amenities, and total cost for both instances with appropriate labels.
Where creating classes, we prefer to hide our data from the outside world in order to ensure encapsulation. To help achieve this we almost always declare our instance variables (or fields) to be Obscured Private Internal Restricted
The program is Java. Part 1. Create an abstract Parent Class called “Vehicle” strictly based on the UML. (Do not include anything extra, do not miss any data fields or methods. # denotes protected visibility modifier.). Add comments stating where data fields, constructors, toString() and other methods(if any). Part 2. Create a child Class called “ElectricVehicle” strictly based on the UML. Add comments stating where data fields, constructors, toString() and other methods(if any). Part 3. Write a main method inside Vehicle class, having the following: a) Create a new instance of the “ElectricVehicle” class using the no-arg constructor and assign it to the object reference of type “Vehicle” class. b) Create a new instance of the “ElectricVehicle” class using the overloaded constructor and assign it to the object reference of type “Vehicle” class. c) Display the content of both the objects(using toString() method)
The Player class below will contain two int attributes and a constructor. The class will also contain a method getScore that can be accessed from outside the class. public class Player { /* missing code */ } Which of the following replacements for /* missing code */ is the most appropriate implementation of the class? private int score; private int id; private Player(int playerScore, int playerID) { /* implementation not shown */ } private int getScore() { /* implementation not shown */ } private int score; private int id; private Player(int playerScore, int playerID) { /* implementation not shown */ } private int getScore() { /* implementation not shown */ } private int score; private int id; public Player(int playerScore, int playerID) { /* implementation not shown */ } private int getScore() { /* implementation not shown */ } private int score; private int id; public Player(int playerScore, int playerID) { /* implementation not shown */ } private int…

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