Search for textbooks, step-by-step expl= bartlebye Q&A LibraryDesign a class namStart your trialDesign a class named MyPoint to represent a point withX-and y-coordinates. The class contains:The data fields x and y that represent the coordinates with getter methods.A no-arg constructor that creates a point (0, 0).A constructor that constructs a point with specified coordinates.A method named distance that returns the distance from this point to aspecified point of the MyPoint type.A method named distance that returns the distance from this point toanother point with specified x- and y-coordinates.A static method named distance that returns the distance from two MyPointobjects.Draw the UML diagram for the class then implement the class. Write a testprogram that creates the two points (0, 0) and (10, 30.5) and displays the distancebetween them.O16WMacR eok

Answered: Design a class named MyPoint to…

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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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…
Create a Class Pet with the following data members Identification: String species : String (e.g. cat, dog, fish etc)  breed: String  Age (in days): int  Weight: float  Dead: boolean 1. Provide a constructor with parameters for all instance variables. 2. Provide getters for all and setters for only breed, and weight 3. Provide a method growOld() that increases the age of the pet by one day. A dead pet wont grow old 4. Provide a method growHealthy(float w) that increases the weight of the pet by the given amount w. A dead pet cannot grow healthy. 5. Provide a method fallSick(float w) that reduces the weight of the pet by the given amount. The least weight a pet can have is 0 which will mean that the pet has died. If the value of weigh is 10 kg and the method is called with an argument of 11 kg then you will set it to 0 and set the dead to an appropriate value to mark the death of the pet 6. Provide a toString method that shows an appropriate well formatted string…
1. for this question do not write the code just explain how you would 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.
The Rockford Daily Clarion wants you to design a class named Issue. Fields include the issue number, the total number of advertisements sold in each issue, and total advertising revenue. Include get and set statements for each field. Include a static method that displays the newspaper's motto, (i.e., Everything you need to know) Include three overloaded constructors as follows. A default constructor that sets the issue number to 1 and the other fields to 0. A constructor that allows you to pass values for all three fields. A constructor that allows you to pass an issue number and a number of advertisements sold but sets the advertising revenue at $50 per ad. Create a class diagram and write the pseudocode that defines the class. Design an application that declares three Issue objects using a different constructor version with each object. Display each Issue's values and then display the motto.
Create a class named Package with data fields for weight in ounces, shipping method, and shipping cost. The shipping method is a character: A for air, T for truck, or M for mail. The Package class contains a constructor that requires arguments for weight and shipping method. The constructor calls a calculateCost() method that determines the shipping cost, based on the following table: Weight (oz.) Air ($) Truck ($) Mail ($) 1 to 8 9 to 16 17 and over 2.00 3.00 4.50 1.50 2.35 3.25 .50 1.50 2.15 The package class also contains a display() method that displays the values in all four fields. Create a subclass named InsuredPackage that adds an insurance cost to the shipping cost, based on the following table: Shipping Cost Before Insurance ($) Additional Cost ($) 0 to 1.00 1.01 to 3.00 3.01 and over 2.45 3.95 5.55 Write an application named UsePackage that instantiates at least three objects of each type (Package and InsuredPackage) using a variety of…
Assume the "Student" class has a constructor that assigns a string to an attribute called "name", has a setter method that assigns a string to the object's "name" attribute and a getter method that returns a Student object's name attribute. What will the following code print? Student student1 = new Student("Alex"); student1; Student student2 = Student student 3 = student2 Student2.setName("Aiden") ; Student3.setName("River"); System.out.println(student1.getName());
write the definition of a class Player containing: an instance variable name of type string, initialized to the empty string an instance variable score of type int, initialized to 0 a method called set_name that has one parameter, whose value it assigns to the instance variable name a method cale set_score that has one parameter, whose value it assigns to teh instance variable score a method called get_name that has no parameters and that returns the value of the instance variable name a method called get_score that has no parameters and that returns the value of the instance variable score no constructor need to be defined using python
Complete the Car class by creating an attribute purchase_price (type int) and the method print_info() that outputs the car's information. Ex: If the input is: 2011 18000 2018 where 2011 is the car's model year, 18000 is the purchase price, and 2018 is the current year, then print_info() outputs: Car's information: Model year: 2011 Purchase price: $18000 Current value: $5770 Note: print_info() should use two spaces for indentation.
The atoms of different elements have different numbers of protons, neutrons and electrons. Electrons are negatively charged; protons are positively charged and neutrons have no charge. Write a definition for an atom class that contains: Fields for storing the numbers of protons, neutrons and electrons with appropriate visibility; Setter and getter methods for manipulating these fields, ensuring that the minimum value for electrons and protons is 1, and the minimum value for neutrons is 0; A constructor that initializes new objects of atom to be the smallest element (Hydrogen), for which the number of protons is 1, the number of neutrons is 0, and the number of electrons is 1. Write a new method for the atom class called ision that will return true or false, depending upon whether the atom is an ion. An atom is an ion if it is charged (i.e., if the number of electrons ≠ the number of protons). Write a new method for the atom class called getAtomicMassNumber that will calculate and…
Write the definition of a class Player that has the following methods: • An __init__ method that initializes the following attribute variables: o An attribute variable named name , initialized to the empty string. o An attribute variable named score , initialized to the value 0. • A method named set_name that accepts one argument that is assigned to the attribute variable name . • A method named set_score that accepts one argument that is assigned to the attribute variable score . • A method named get_name that accepts no arguments, and returns the value of the attribute variable name . • A method named get_score that accepts no arguments, and returns the value of the attribute variable score .
a constructor that takes in an int, a string, and a double, constructor will assign them to the ID, name, and Averageinstance variables, then a no-argument (zero-parameter) constructor that will set the ID to the name to “No name assigned” and the Average to –1.0. With an accessor method for the name variable and a mutator method for the average variable. a toString() method that will display all three instance variables on a single line, with a " | " between each one. and then an equals() method that returns true only if all three instance variables are equal
JAVA QUESTION REQUIRES SEPARATE CLASSES, CANNOT BE WRITTEN IN ONE MAIN METHOD E.G. ACCOUNT SECTION WRITTEN IN ACCOUNT CLASS, CUSTOMER SECTION WRITTEN IN CUSTOMER CLASS ETC. Phase 2 In this phase you’ll be writing code within the methods of your classes to make the tests pass. Account Each account should have a constant, unique id. Id numbers should start from 1000 and increment by 5. The ACCOUNT_ID attribute should be initialised when the account object is created. The id should be generated internally within the class, it should not be passed in as an argument. The deposit method should increase the balance by the value passed in as an argument. The withdraw method should reduce the balance by the value passed in as an argument. It should return the value of the argument The account should be able to go overdrawn The correctBalance method should change the balance to match the value passed in as an argument. Testing your code for Account Run TestAccountInitialisation to check…

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