(Car Class) Create a class called Car that includes three instance variables-a model (type String), a year (type String), and a price (double). Provide a constructor that initializes the three instance variables. Provide a set and a get method for each instance variable. If the price is not positive, do not set its value. Write a test application named CarApplication that demonstrates class Car's ca- pabilities. Create two Car objects and display each object's price. Then apply a 5% discount on the price of the first car and a 7% discount on the price of the second. Display each Car's price again. 3.13

(Car Class) Create a class called Car that includes three instance variables-a model (type String), a year (type String), and a price (double). Provide a constructor that initializes the three instance variables. Provide a set and a get method for each instance variable. If the price is not positive, do not set its value. Write a test application named CarApplication that demonstrates class Car's ca- pabilities. Create two Car objects and display each object's price. Then apply a 5% discount on the price of the first car and a 7% discount on the price of the second. Display each Car's price again. 3.13

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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(The Account class) Account -id: int -balance: double -annualInterestRate : double -dateCreated : Date +Account( ) +Account(someId : int, someBalance : double) +getId() : int +setId(newId : int) : void +getBalance() : double +setBalance(newBalance : double) : void +getAnnualInterestRate( ) : double +setAnnualInterestRate(newRate : double) : void +getDateCreated( ) : Date +getMonthlyInterestRate( ) : double +getMonthlyInterest( ) : double +withdraw(amt : double) : void +deposit(amt : double) : void Design a class named Account that contains: ■ A private int data field named id for the account (default 0). ■ A private double data field named balance for the account (default 0). ■ A private double data field named annualInterestRate that stores the current interest rate (default 0). Assume all accounts have the same interest rate. Make it static. ■ A private Date data field named dateCreated that stores the date when the account was created. (private Date dateCreated)…
(Triangle class) Design a new Triangle class that extends the abstract GeometricObject class. Draw the UML diagram for the classes Triangle and GeometricObject and then implement the Triangle class. Write a test program that prompts the user to enter three sides of the triangle, a colour, and a Boolean value to indicate whether the triangle is filled. The program should create a Triangle object with these sides and set the colour and filled properties using the input. The program should display the area, perimeter, colour, and true or false to indicate whether it is filled or not.
Indicate whether the statement is true or false. 13. The non-static methods of a class are called instance method. 14. A constructor has no type and is therefore a void method. 15. A class can have only two constructors. 16. In shallow copying, each reference variable refers to its own object. 21. The method finalize automatically executes when the class objects goes out of scope. 22. A mutator method of a class changes the values of data members of the class. 23. In java, the reference this is used to refer to only the methods, not the instance variables of a class. 24. Classes that are defined within other classes are called inside classes. 25. Modifiers are used to alter the behavior of the class 26. A constructor has the same name as the class. 27. Constructors are called like any other method. 28. You can perform some arithmetic operations on class objects.
State whether it is true or false and why .
This program extends the earlier "Online shopping cart" program. (Consider first saving your earlier program). (1) Extend the ItemToPurchase class to contain a new attribute. item_description (string) - Set to "none" in default constructorImplement the following method for the ItemToPurchase class. print_item_description() - Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter. Ex. of print_item_description() output: Bottled Water: Deer Park, 12 oz. (2) Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs (empty methods) initially, to be completed in later steps. Parameterized constructor which takes the customer name and date as parameters Attributescustomer_name (string) - Initialized in default constructor to "none"current_date (string) - Initialized in default constructor to "January 1, 2016"cart_items (list)Methodsadd_item()Adds an item to cart_items list. Has a parameter of…
This program extends the earlier "Online shopping cart" program. (Consider first saving your earlier program). (1) Extend the ItemToPurchase class to contain a new attribute. item_description (string) - Set to "none" in default constructorImplement the following method for the ItemToPurchase class. print_item_description() - Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter. Ex. of print_item_description() output: Bottled Water: Deer Park, 12 oz. (2) Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs (empty methods) initially, to be completed in later steps. Parameterized constructor which takes the customer name and date as parameters Attributescustomer_name (string) - Initialized in default constructor to "none"current_date (string) - Initialized in default constructor to "January 1, 2016"cart_items (list)Methodsadd_item()Adds an item to cart_items list. Has a parameter of…
can you help me how to test this Part 1: Test Program Write a program to test all test cases outlined in the test plan. For each method (unit) being tested, ensure your client program provides output clearly describing the method being tested along with the expected and actual result. When testing constructors, verify the results by calling an accessor method of the class. When testing mutators, use the accessor method to verify the state change. When a test fails (actual does not match the expected), correct the method code, then re-test. Keep in mind that a poorly written test can produce inaccurate test results. If a test fails, ensure you have written the test correctly before modifying your unit code. Output Requirement For each method (unit), output the method signature. For each test, output the following: Test number Outcome description Expected result Actual result Leave one blank line between each test. Sample StudentGrades(int) Test #1 - Initialize grades array…
Programming exercise (in java eclipse , please add comment for each step)thank you Create a class called "Bird" and do the following: 1)Define two data fields, 2)Define one default constructor 3)Define one constructor that takes two arguments 4) Define one method Inside the main() method, you have to create two objects for the class "Bird" one by using default constructor and another by using the constructor that takes two arguments. Also call the instance method inside the main() method (The class data fields and method should be meaningful clearly representing the entity 'Bird' . Do not define irrelevant data fields and method.)
Exercise: 1) Design a class ComboLock that works like the combination lock in a gym locker, as shown below. The lock is constructed with a combination-three numbers between 0 and 39. The reset method resets the dial so that it points to 0. The turnLeft and turnRight methods turn the dial by a given number of ticks to the left or right. The getStatus method returns a Boolean indicating whether the lock is opened(true) or closed(false). The lock opens if the user first turned it right to the first number in the combination, then left to the second, and then right to the third. 02 36 2) Document your class. 3) Provide a tester class and test a scenario in which you create a comboLock having the code (25, 36, 19), unlock it successfully, and print the status of the lock after each turn. 4) Put the ComboLock class and the tester class in two distinct packages
use java to answerand Thank you
Quèstion 12 A method CAN NOT change the value of a variable of a primitive type that is an argument to the method call True False
//Todo write test cases for SimpleCalculator Class // No need to implement the actual Calculator class just write Test cases as per TDD. // you need to just write test cases no mocking // test should cover all methods from calculator and all scenarios, so a minimum of 5 test // 1 for add, 1 for subtract, 1 for multiply, 2 for divide (1 for normal division, 1 for division by 0) // make sure all these test cases fail public class CalculatorTest { //Declare variable here private Calculator calculator; //Add before each here //write test cases here }