Create a Circle class with the following attribute: double: radius Your class should contain the following methods: A default constructor with one parameter r for radius A copy constructor Accessor and mutator methods / getters & setters Equals0 method to return true if objects have the same radius getArea0 method to calculate and return the area of the circle The toString0 method which return a string with the radius and the area of the object. Static getTotalArea0 method which takes an array of circles as input and calculates the total area of the objects in the array Driver method to demonstrate the correctness of implementation Two arrays filled with circles Display the equivalence of testing every Circle at the same index to the circle in the other array Create an option to have the Circles match at the same index in each array without creating a shallow copy

Create a Circle class with the following attribute: double: radius Your class should contain the following methods: A default constructor with one parameter r for radius A copy constructor Accessor and mutator methods / getters & setters Equals0 method to return true if objects have the same radius getArea0 method to calculate and return the area of the circle The toString0 method which return a string with the radius and the area of the object. Static getTotalArea0 method which takes an array of circles as input and calculates the total area of the objects in the array Driver method to demonstrate the correctness of implementation Two arrays filled with circles Display the equivalence of testing every Circle at the same index to the circle in the other array Create an option to have the Circles match at the same index in each array without creating a shallow copy

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 5PE

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a. Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition: Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1. Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.) Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2. Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20. Include a function that returns a string that contains a Fraction in the usual display formatâ€”the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3). b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2. c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).
Create an car class that will be used by a car shop to keep track of inventory. The following attributes should be present in your automobile class: -private string make-private string model-private string color-private int year-private int mileage. The program should have methods such as: -default constructor-parameterized constructor-add a new vehicle method-list vehicle information (return string array)-remove a vehicle method-update vehicle attributes method. All methods should include try..catch constructs. Except as noted all methods should return a success or failure message (failure message defined in "catch"). 1. Create an additional class to call your automobile class (e.g., Main or AutomobileInventory). Include a try..catch construct and print it to the console. 2. Call automobile class with parameterized constructor (e.g., "make, model, color, year, mileage").a) Then call the method to list the values. Loop through the array and print to the screen. 3. Call the remove…
Create a class called Invoice in your assignment source package. An Invoice should include four pieces of information as attributes(instance variables) - a part number of type String, a part description of type String, a purchasing quantity of type Int, and a price per item of type double. Your class should have a full constructor that initializes all the four attributes. Provide a set and a get method for each attribute. In addition, provide a method named getInvoiceTotal that calculates the invoice total, purchasing quantity * price per ite, and returns the invoice total. If the quantity is negative, returns 0. Create an test app named InvoiceTest in the same package that demonstrates class Invoice's capabilities.
1. Create a class called Student, with the following attributes/variables:a. studentName (String)b. studentNumber (int)sc. regYear(long)d. faculty(String)e. department(String)2. Add the following methods in Student:a. accessors and mutators for all variablesb. toString methodi. Formulate your toString so that it only shows studentName,studentNumber and faculty3. Create a class called MyFriends, with the following attributes variables:a. studentArray(Student[])4. Add the following methods in MyFriends:a. fillArrayi. Using scanner ask how many students does the user want to inputii. Capture user input for all of his friends(Of course we are assuming all your friends would be similarUWC students, go ask around and meet new friends, alsopreferably not in the same Computer Science department … ifpossible … only if possible)b. maini. Call the fillArray methodii. Count how many Computer Science studentsiii. If half or more students are Computer Science students, thendisplay “You … need more…
Create a class Car with parameters companyName, color, maxSpeed (Not more than 150) andcategory. Use appropriate data types and access specifiers. Use default constructor to create objectsof cars. Write methods to set and get the values of parameters of car. Write methods to find categoryof car and to display the complete details of car along with category. Create another class TestCarwhich creates array of n number of cars, uses appropriate set methods to set the values of parametersof every car. Display the details of each car. (If max speed is between 120 and 150 then category is“High speed” otherwise “Normal”) (JAVA)
Modify the Car class example and add the following: A default constructor that initializes strings to “N/A” and numbers to zero. An overloaded constructor that takes in initial values to set your fields (6 parameters). accel() method: a void method that takes a double variable as a parameter and increases the speed of the car by that amount. brake() method: a void method that sets the speed to zero. To test your class, you will need to instantiate at least two different Car objects in the main method in the CarDemo class. Each of your objects should use a different constructor. For the object that uses the default constructor, you will need to invoke the mutator methods to assign values to your fields. Invoke the displayFeatures() method for both objects and display the variables. Demonstrate the use of the accessor method getColor() by accessing the color of each car and printing it to the console. Use the method accel to increase the speed of the first car by 65 mph. Use…
Define the Circle2D class that contains: Two double data fields named x and y that specify the center of the circle with get methods. A data field radius with a get method. A no-arg constructor that creates a default circle with (0, 0) for (x, y) and 1 for radius. A constructor that creates a circle with the specified x, y, and radius. A method getArea() that returns the area of the circle. A method getPerimeter() that returns the perimeter of the circle. A method contains(double x, double y) that returns true if the specified point (x, y) is inside this circle. See Figure 10.14(a). A method contains(Circle2D circle) that returns true if the specified circle is inside this circle. See Figure 10.14(b). A method overlaps(Circle2D circle) that returns true if the specified circle overlaps with this circle. See the figure below. Figure (a) A point is inside the circle. (b) A circle is inside another circle. (c) A circle overlaps another circle. Draw the UML diagram for the class.…
a) Create an enumeration named Departments that contain four set of values FINANCE, HR, IT, and MARKETING.b) Create a class named PersonDetails that contains fields for a person’s first name (String), last name (String), and address (String). The class have- A constructor that accepts parameters for each field.- Get methods for each field.c) Create a class named Employee that contains fields for an employee ID (int), Social Security number (String), personal information (Person object), department (Departments type), and annual salary (double). The class have- A constructor that requires values for each data field.- Get methods for each of the data fields.- Set methods for each of the data fields.d) Create an application/class named EmployeeSort that allows a user to enter values for an array of 5 Employee objects (create an array of Employee type that will save 5 employee objects). Prompt a user for the data needed to create an employee object. Continue to prompt the user for Social…
a) Create an enumeration named Departments that contain four set of values FINANCE, HR, IT, and MARKETING.b) Create a class named PersonDetails that contains fields for a person’s first name (String), last name (String), and address (String). The class have- A constructor that accepts parameters for each field.- Get methods for each field.c) Create a class named Employee that contains fields for an employee ID (int), Social Security number (String), personal information (Person object), department (Departments type), and annual salary (double). The class have- A constructor that requires values for each data field.- Get methods for each of the data fields.- Set methods for each of the data fields.d) Create an application/class named EmployeeSort that allows a user to enter values for an array of 5 Employee objects (create an array of Employee type that will save 5 employee objects). Prompt a user for the data needed to create an employee object. Continue to prompt the user for Social…
Write Rectangle class to represent a rectangle. The class contains:a. Two double data fields named width and height that specify the width and height ofthe rectangle. The default values are 1 for both width and height.b. A no-arg constructor that creates a default rectangle.c. A constructor that creates a rectangle with the specified width and height.d. A method named getArea() that returns the area of this rectangle.e. A method named getPerimeter() that returns the perimeter.
ShoppingCart.java - Class definition ShoppingCartManager.java - Contains main() method Build the ShoppingCart class with the following specifications. Private fields String customerName - Initialized in default constructor to "none" String currentDate - Initialized in default constructor to "January 1, 2016" ArrayList cartItems Default constructor Parameterized constructor which takes the customer name and date as parameters Public member methods getCustomerName() accessor getDate() accessor addItem() Adds an item to cartItems array. Has a parameter of type ItemToPurchase. Does not return anything. removeItem() Removes item from cartItems array. Has a string (an item's name) parameter. Does not return anything. If item name cannot be found, output a message: Item not found in cart. Nothing removed. modifyItem() Modifies an item's description, price, and/or quantity. Has a parameter of type ItemToPurchase. Does not return anything. If item can be found (by name) in cart,…
Create a class called Jug that represents a jug of liquid. The UML for this class is shown below: Jug private String liquidType private int gallons public Jug public Jug(String type, int gal) public void setGallons() public void getGallons() public String getLiquidType() public boolean isEmpty() Your class should have the following private state: liquidType (a string) gallons (an integer) Your class should have the following constructors: A default constructor that creates an empty jug of water. A constructor that accepts the type of liquid the jug contains, and the number of gallons the jug contains, in that order. Your class should have the following behaviors: A method called setGallons that allows you to set the number of gallons in the jug. A method called getGallons that allows you to get the number of gallons in the jug. A method called getLiquidType that allows you to get the type of liquid in the jug. A method called isEmpty that returns true if the…