Using Java Create a constructor named Exam that assigns "Good luck" to a previously declared String variable named message. Create an empty overloaded constructor for the Exam class with two (2) String parameters named period and level. Declare a double-type accessor named getPrice that returns the value of price.
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Using Java
- Create a constructor named Exam that assigns "Good luck" to a previously declared String variable named message.
- Create an empty overloaded constructor for the Exam class with two (2) String parameters named period and level.
- Declare a double-type accessor named getPrice that returns the value of price.
- Declare a boolean-type accessor named isFinished that returns the value of status.
- Declare a class named Midterm that inherits from the class named Exam.
- Create three (3) class declarations to show multiple levels of inheritance. Use the classes named Exam, Midterm, and Essay.
- Create a constructor named Midterm that prints "Exam has started." using println(). Its first statement should be a call to a constructor in the parent class.
- Given the base class named Quiz and the derived class named Essay, write a statement to show inheritance between these classes.
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- Got stuck on this for my daily coding practice. I would like to understand it in Java. Given main(), complete the FoodItem class (in file FoodItem.java) with constructors to initialize each food item. The default constructor should initialize the name to "Water" and all other fields to 0.0. The second constructor should have four parameters (food name, grams of fat, grams of carbohydrates, and grams of protein) and should assign each private field with the appropriate parameter value. Ex: If the input is: Water the output is: Nutritional information per serving of Water: Fat: 0.00 g Carbohydrates: 0.00 g Protein: 0.00 g Number of calories for 1.00 serving(s): 0.00 Ex: If the input is: M&M's 10.0 34.0 2.0 3.0 where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 3.0 is the number of servings, the output is: Nutritional information per serving of M&M's: Fat: 10.00 g Carbohydrates: 34.00 g Protein: 2.00…Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Please make sure that no errors show up in the Java Compiler when testing the code. Thank you. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void…Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void main(String[] args){/////add your code here}}…
- Write a program named SalespersonDemo that instantiates objects using classes named Real EstateSalesperson and GirlScout. Demonstrate that each object can use a SalesSpeech() method appropriately. Also, use a MakeSale() method two or three times with each object, and display the final contents of each objects data fields. First, create an abstract class named Salesperson. Fields include first and last names; the Salesperson constructor requires both these values. Include properties for the fields. Include a method that returns a string that holds the Salespersons full name—the first and last names separated by a space. Then perform the following Create two child classes of Salesperson: Real EstateSalesperson and Girl Scout. The Real EstateSalesperson class contains fields for total value sold in dollars and total commission earned (both of which are initialized to 0), and a commission rate field required by the class constructor. The Girl Scout class includes a field to hold the number of boxes of cookies sold, which is initialized to 0. Include properties for every field. Create an interface named ISell able that contains two methods: SalesSpeech() and MakeSale(). In each Real EstateSalesperson and Girl Scout class, implement SalesSpeech() to display an appropriate one- or two-sentence sales speech that the objects of the class could use. In the Real Estatesalesperson class, implement the MakeSale() method to accept an integer dollar value for a house, add the value to the Real EstateSalespersons total value sold, and compute the total commission earned. In the Girl Scout class, implement the MakeSale() method to accept an integer representing the number of boxes of cookies sold and add it to the total field.Create an application for Ninas Cookie Emporium named CookieDemo that declares and demonstrates objects of the CookieOrder class and its descendants. The CookieOrder class includes auto-implemented properties for an order number, recipients name, and cookie type (for example, chocolate chip), and fields for number of dozens ordered and price. When the field value for number of dozens ordered is set, the price field is set as $15 per dozen for the first two dozen and $13 per dozen for each dozen over two. Create a child class named Special Cookieorder, which includes a field with a description as to why the order is special (for example, gluten-free). Override the method that sets a CookieOrders price as described in part a, but also to include special handling, which is SIO for orders up to $40 and $8 for higher-priced orders. Create an application named CookieDem02 that demonstrates using several Special CookieOrder objects.Write a tester program to test the mobile class defined below. Create the class named with your id (for example: Id12345678) with the main method. Create two mobiles M1 and M2 using the first constructor. Print the characteristics of M1 and M2. Create one mobile M3 using the second constructor. Change the id and brand of the mobile M3. Print the id of M3. The programming I'm using is java. So, I'll be much appreciated if the answer was in java plus, Can you solve with the entry below? public class Mobile { private int id; private String brand; public Mobile() { id = 0; brand = ""; } public Mobile(int n, String name) { id = n; brand = name; } public void setBrand(String w) { brand = w; } public void setId(int w) { id = w; } Public int getId() { return id; } public String getBrand() { return brand; } }
- Given main(), complete the FoodItem class (in file FoodItem.java) with constructors to initialize each food item. The default constructor should initialize the name to "Water" and all other fields to 0.0. The second constructor should have four parameters (food name, grams of fat, grams of carbohydrates, and grams of protein) and should assign each private field with the appropriate parameter value. Ex: If the input is: Water the output is: Nutritional information per serving of Water: Fat: 0.00 g Carbohydrates: 0.00 g Protein: 0.00 g Number of calories for 1.00 serving(s): 0.00 Ex: If the input is: M&M's 10.0 34.0 2.0 3.0 where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 3.0 is the number of servings, the output is: Nutritional information per serving of M&M's: Fat: 10.00 g Carbohydrates: 34.00 g Protein: 2.00 g Number of calories for 1.00 serving(s): 234.00 Number of calories for 3.00 serving(s):…Create a class Date that converts a string of the form of “mm/dd/yyyy” into an object with three fields – month, day, and year. The class constructor may do this job, but do not forget to check the string for correctness. Once you have this class ready, input the date as a string with the following converting into an object of type Date. The language is in Java.In Java, Create a class Rectangle with double attributes length and width. The default constructor should set these attributes to 1. Provide methods that calculate the rectangle's perimeter and area, as well as accessors and mutators for both data fields. The mutator methods for length and width should verify that the number being passed in is larger than 0.0 and less than 20.0 -- if it doesn't fit those criteria, the value of the field should not be changed.Write a Driver class in the same file to test your Rectangle class. It should prompt the user to enter a length and width of a rectangle, and then print out the area and perimeter of the rectangle. (Use the mutators to set the length and width of the rectangle, not the constructor.)
- Code in Java Define a class named MobilePhone with the attributes brand name, model, color and price. Define 3 constructors - the first one is the default constructor, the second one initializes all data members and the third one gives an initial value to the brand name Apple, model iPhone XR and price to 54250 while allowing color to be initialized by the user. Also, write a display method that prints in this manner: Brand: Samsung Model: S10 Color: Black Price: 53300.0 Write a method updatePrice that updates the price of the mobile phone. The method accepts a price. If the value of the price is negative the price must be deducted with the value. But if positive price must be added with the value. It will not allow update of price if will result to a negative value for price. For example: Test Result MobilePhone phone = new MobilePhone("Samsung", "S10", "Black", 53300.00); phone.display(); Brand: Samsung Model: S10 Color: Black Price: 53300.0…JAVA Question Override the equals method for the JediMaster class. The JediMaster class has two fields that should be considered when testing for equality: one of type String with the identifier name, and the other of type int with the identifier midichlorianCount. Write a draw method for the Ball class that will allow a Ball object to draw itself. You may assume the class has the following instance variables: xPos, yPos, diameter, color. The first three are of type int, and the last is of type Color. Suppose you are writing a GUI application and have created a subclass of the JFrame class that contains a JTextField object with the identifier numberOfDonuts. Write some Java code that will allow you to get the value a user has entered in that field and convert it to an int. You do not need to worry about checking if the value is a number first. Write a mutator method for an instance variable of type int with the identifier employeeID. Your mutator method should not allow values larger…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",…
