P1.In this question, you are provided a completed superclass – Shape (Do not makeany changes to this class!). This class represents generic shapes and has several methodsthat you will have to override in the Circle and Rectangle subclasses, whose code skeletonsare provided as well. You are required to complete these two classes so that they can correctlydescribe and calculate their attributes.For the Circle class, create the following:A private double instance variable m radius.A constructor that takes two parameters (in the order of color, radius). It should use theparameter for radius to set the m_radius instance variable and then explicitly call theparent class constructor using the super keyword and pass in the color parameter.A method that overrides the calcArea method of the superclass and calculates the areaof the circle. The area of a circle can be calculated as 3.14 x r² (where r is the radius).A method that overrides the calcPerimeter method of the superclass and calculates theperimeter of the circle. The perimeter of a circle can be calculated as 2 x 3.14 xr (whereris the radius).For the Rectangle class, create the following:Two private double instance variables m width and m_length.A constructor that takes three parameters (in the order of color, width, length). It should usethe parameters for width and length to set the instance variables and then explicitly call theparent class constructor using the super keyword and pass in the color parameter.A method that overrides the calcArea method of the superclass and calculates the areaof the rectangle. The area of a rectangle can be calculated as width x height.A method that overrides the calcPerimeter method of the superclass and calculates theperimeter of the rectangle. The perimeter of a rectangle can be calculated as 2 × (width +height). P2.In this question, you are provided with a Date class and an incompleteEnhancedDate class. The EnhancedDate class inherits from the Date class with two moremethods:addDays (int numDays)This method adds a certain number of days to the daterepresented by the current Date object. The changes should be left on the current object.This task is done by first creating an object of the EnhancedDate class in the test driver withan initial date and then calling the addDays method on this object. For example, if the currentEnhancedDate object, say currentDate, contains the date 1/1/2016, then after theaddDays (20) method is called on currentDate, the date in it would be 1/21/2016 because20 days has been added to the original date. This is not a simple addition because you need totake care of different months as well as leap years.This method computes the number of days elapsed fromdaysFrom (Date startDate)startDate, and returns an integer. If the startDate is earlier than the current day, the returnshould be positive, whereas if it is later than the current date, then this method should return anegative number. Hint: you can call the compareTo method provided in the Date class tocheck which of the two dates is older so that you can always count the days from the older dateto the newer date. You may choose to use the above addDays method to simplify thisimplementationdate.- you can keep adding a day to the older date until you bring it up to the newer

i.Class of circle The following class diagram depicts the design of a circle class. It includes the…

For the Circle class, create the following: • A private double instance variable m_radius. • A constructor that takes two parameters (in the order of color, radius). It should use the parameter for radius to set the m_radius instance variable and then explicitly call the parent class constructor using the super keyword and pass in the color parameter. • A method that overrides the calcArea method of the superclass and calculates the area of the circle. The area of a circle can be calculated as 3.14 xr² (where r is the radius). • A method that overrides the calcPerimeter method of the superclass and calculates the perimeter of the circle. The perimeter of a circle can be calculated as 2 x 3.14 xr (where r is the radius). For the Rectangle class, create the following: • Two private double instance variables m_width and m_length. • A constructor that takes three parameters (in the order of color, width, length). It should use the parameters for width and length to set the instance variables and then explicitly call the parent class constructor using the super keyword and pass in the color parameter. • A method that overrides the calcArea method of the superclass and calculates the area of the rectangle. The area of a rectangle can be calculated as width x height.

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