Step 1: Create the abstract class that has following methods. • Calculate the area of circle(Abstract method) • Calculate the area of triangle(Abstract method) • Calculate the area of rectangle(Method with implementation) Step 2: Create another class that extends above class and provide implementation of abstract methods. Step 3: Create the main method inside above class and display output of area of circle, area of triangle and area of rectangle. You need to submit the following things:

Step 1: Create the abstract class that has following methods. • Calculate the area of circle(Abstract method) • Calculate the area of triangle(Abstract method) • Calculate the area of rectangle(Method with implementation) Step 2: Create another class that extends above class and provide implementation of abstract methods. Step 3: Create the main method inside above class and display output of area of circle, area of triangle and area of rectangle. You need to submit the following things:

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

See similar textbooks

Similar questions

I need the answer as soon as possible
Define a class named Employee. This class should extend the Person class from the previous question. The class should have a constructor, which takes the name, age, employer (String) and salary (int) as parameters (in that order). The first two parameters should be passed to the constructor of the superclass and the value of the last two parameters should be stored in instance variables. The class should define the methods, getSalary which returns the salary of the employee and getEmployer which returns the name of the employer. Any methods from the previous question that need to be overridden should be overridden! Use super and instanceof as appropriate. I.e., for the following methods you should be able to call the method in the superclass for specific situations (e.g. the compareTo method in the superclass can be called if you receive anything other than an Employee, and this also holds for the equals method). The toString method only needs to append details and as such can also…
JAVA
Write a class called Triangle with the required constructor and methods to get the following output. Subtasks: 1. Create a class called Triangle. 2. Create the required constructor. Use Encapsulation to protect the variables. [Hint: Assign the variables in private] 3. Create getBase(), getHeight(), setBase and setHeight() method to access variables. 4. Create a method called area to calculate the area of triangles. 5. Handle the operator overloading by using a special method to calculate the radius and area of triangle 3. [You are not allowed to change the code below] Output: First Triangle Base: 10 First Triangle Height: 5 First Triangle area: 25.0 Second Triangle Base: 5 Second Triangle Height: 3 Second Triangle area: 7.5 Third Triangle Base: 5 Third Triangle Height: 2 Third Triangle area: 5.0 # Write your code here for subtasks 1-5 t1 = Triangle(10, 5) print("First Triangle Base:" , t1.getBase()) print("First Triangle Height:" , t1.getHeight()) print("First Triangle area:"…
Java program
Hello all! Need some help with this assignment. Need to create an array of 8 employees ( see image for details ) Thank you!
Create a class named Person.a. This class must have two variables to store name (string) and age (int). These variables should not be accessible from outside the class.b. Encapsulate the variables defined in item a with a property (an intermediate variable) so that they can be accessed from other classes. And after this step, use only intermediate variables that you defined for encapsulation within methods and other classes.c. Define a constructor method for this class. Code the constructor method to initialize the properties of the class at the time of object definition.D. Define a method called Print Info that will print the information of the class object on the screen in a proper format.
a) Write the definition of method caleTixPrice () for both subclasses that calculate and return the ticket price using the following information: To get the total ticket price, total = ticket price x quantity. For Rock, the ticket price as shown in Table 1. VIP Others VIP TABLE 1 If two-day ticket is chosen, additional RM200 will be added to each ticket Level 1 Price (RM) 500 For Classical, the ticket price as shown in Table 2. TABLE 2 Level 2 200 Price (RM) 690 500 350 5% discount will be given if member
Python Code: Write a class called Person with a constructor that takes two arguments, name and age and the saves these as attributes Write a method in this called print_person that prints out this information the console Confirm that you did it properly by instantiating an object called p1 and calling the method on the object. Lastly, extend the constructor by adding functionality that checks the input name only contains letters (no numbers allowed).
Need it in the java language, doesn't have to be perfect. If you can do the whole program that would be best but if not an outline would suffice so I can get a good idea of how to finish the program. Thanks!
Design and implement a class called Car that contains instance data that represents the company, price, model, and year of the car. Define the Car constructor to initialize these values. Include getter and setter methods for all instance data, and a toString method that returns a one-line description of the car. Create a driver class called CarTest, whose main method instantiates array of Car objects and write the following methods: 1) Methods that receives an array of cars and a string called co and returns an array that contains cars whose company equal to co. 2) A Method called getTopByCompany that receives an array of Cars and then returns an array of cars containing the cars that have the highest price compared with cars from the same company.
PLEASE WRITE THE CODE WITH USER ERROR AND ALL ACCEPTABLE ENTRIES!!!