Write a java program to create an abstract class named Shape that contains two integers and ar empty method named printArea(). Provide three classes named Rectangle, Triangle and Circle such that each one of the classes extends the class Shape. Each one of the classes contain only the method printArea() that prints the area of the given shape. What is difference between abstract class and interface in Java?
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- 1. Implement the following using JAVA :- a. Design a class named Person and its two subclasses named Student and Employee. b. Make Faculty and Staff subclasses of Employee. Please note that, A person has a name, address, phone number, and email address. A student has a class status (freshman,sophomore, junior, or senior). You can define the status as a constant. An employee has office & salary. • A faculty member has office hours and a rank. • A staff member has a title. c. Draw a UML diagram of the system.{In Java Programming Please} Create a class hierarchy that represents different types of employees in a company. Start with a class called Employee that has two methods: calculateSalary() and displayDetails(). Then, create two subclasses of Employee: Manager and Engineer. Override the calculateSalary() method in both subclasses to calculate the salary based on their job role and experience. Override the displayDetails() method in both subclasses to print out a message indicating the details of the employee. Next, create another class called Salesperson that extends Employee and has a method called calculateCommission(). Create two subclasses of Salesperson: SeniorSalesperson and JuniorSalesperson. Override the calculateCommission() method in both subclasses to calculate the commission based on their sales performance. Override the displayDetails() method in both subclasses to print out a message indicating the details of the salesperson. In the main method, create objects of each class…In java Define and create an array (called emps) of object references for objects of class Employee of length 100. (b) Create three objects for classes SalariedEmp, WeeklyEmp, and HourlyEmp (where these 3 classes are subclasses of class Employee); and with references e1, e2, e3 for the 3 objects:(c) Assign e1,e2, e3 to the first three elements of array emps:(d) Print the earnings of the 100 employee in the array emps in one loop (with polymorphism) where earnings are calculated with method earnings():
- PLZ help with the following in java TRUE OR FALSE An interface can contain defined constants as well as method headings or instead of method headings.REFER TO IMAGE (JAVA) a. Write a Java statement that increments the value of count by 1. b. Write a Java statement that outputs the value of count. c. Write the 6 definitions of the constructors and the methods of the class MyClass as described in its definition. d. Write a Java statement that declares myObject1 to be a MyClass object and initializes its instance variable x to 5. __________________________________________________________________ e. Write a Java statement that declares myObject2 to be a MyClass object and initializes its instance variable x to 7. __________________________________________________________________ f. Identify each of the following statements as either valid or invalid (tell why it is invalid). Assume that myObject1 and myObject2 are declared as in parts (d) and (e). myObject1.MyClass( ); ____________________________________ myObject2.setX(50); ____________________________________ MyClass.printCount( );…1. Implement the following using JAVA :- a. Design a class named Person and its two subclasses named Student and Employee. b. Make Faculty and Staff subclasses of Employee. Please note that, A person has a name, address, phone number, and email address. A student has a class status (freshman,sophomore, junior, or senior). You can define the status as a constant. • An employee has office & salary. • Afaculty member has office hours and a rank. • A staff member has a title. c. Draw a UML diagram of the system.
- Define a java Name class with attributes: String firstname, middle name, lastname. Include the following methods: - A constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. - getter and setter methods for all attributes - override toString method Define a class called DebitCard. A debit card has a card number, Name and balance. a) Include a constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. b) Include getters/setters for all attributes. c) Add the following member functions: float inquireBalance() float depositCash(float amount) //increases the balance with amount boolean withdrawCash(float amount) // returns true if sufficient amount is available for withdrawal and decreases the balance by amount float interest(float rate) //calculates the interest rate incurred. Assume the parameter rate is considered as…Define a java Name class with attributes: String firstname, middle name, lastname. Include the following methods: - A constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. - getter and setter methods for all attributes - override toString method Define a class called DebitCard. A debit card has a card number, Name and balance. a) Include a constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. b) Include getters/setters for all attributes. c) Add the following member functions: float inquireBalance() float depositCash(float amount) //increases the balance with amount boolean withdrawCash(float amount) // returns true if sufficient amount is available for withdrawal and decreases the balance by amount float interest(float rate) //calculates the interest rate incurred. Assume the parameter rate is considered as…Please see the below. I have most of it, except for the Inventory class. Would be helpful to see an example of it.Design and implement Java program as follows:(1) There will be a Book Java class with following attributes: id, title, and price.(2) There will be an Inventory Java class which stores and manages a list of Book objects(3) Inventory class will provide the following functionality:a. Add: Prompts user for book data and add to the inventory list. If the book alreadyexists (based on id value), the add request will fail and an error message will beprinted to the consoleb. Remove. Prompts user for book id, finds the id in the inventory list and removesit. If the book matching the id is not in the inventory, remove request will fail andan error message will be printed to the consolec. Find: Prompts user for book id, finds the id in the inventory list and print all thedata for the book (id, title, and price). If the book matching the id is not in theinventory, find request will fail…
- java program: take your time to answer it correct please , thank you It is required to develop an application in Java to maintain information about students registered in various courses in a university. Write a class called Course having data members: courseNum (String such as ITCS214), courseName (String such as Data Structures), credits (int), section (int). Include the following public methods in the class: Default constructor (without any parameters), constructor with 4 parameters, set and get methods for all attributes, equals and toString methods. Write a class called Student having following data fields: idNum (long), firstName (String), lastName (String), gender (char), email (String), coursesRegistered (ArrayList of type Course). Note that coursesRegistered is a list of type ArrayList (Java class) in which each element is of class type Course. The coursesRegistered is the list of courses in which the student is currently registered. It has following methods: Default…using c++ oop !!! kindly need help asap. Implement the shape, rectangle, and square classes with components as shown and the following functionality: Each constructor and destructor prints a message to the screen that it is being called in each class implement the area() method that calculates the area of the figure (for the Shape class you can return 0) Example Constructor shape: Rectanleeeeeee Rectangle constructor 232.5 Rectanleeeeeee Eeeeeeee Rectangle destructor Shape destructor Constructor shape: Squareeeee Rectangle constructor Square constructor Squareeeee AAAaaaa 105.165 Square destructor Rectangle destructor Shape destructor // main.cpp : Defines the entry point for the application.// #include "main.h"using namespace std; int main(void) {{rectangle rec("Rectanleeeeeee", 10, 23.25);std::cout << rec.area() << std::endl;std::cout << rec.get_name() << std::endl;rec.set_name("Eeeeeeee");std::cout << rec.get_name() << std::endl;} {square…JAVA PROGRAMMING - Create a class named "Shape" that has rhe abstract methods getArea() and getPerimeter(). - Create a class named "Rectangle", "Square", and "Circle". Override the methods getArea() and getPerimeter() with the right equation in getting the area and perimeter. - For rectangle, create attribute length and width. For square, side. For circle, radius Inputs: 1. Char input for Shape Type (Rectangle, Square, Circle). 2. Dimensions for specific type of Shape Output: Shape: Rectangle Length: 10 Width: 50 Area: 500.00 Perimeter 120.00