Create a class SubstitutionCipher that implements the interface MessageEncoder, as described in the previous exercise. The constructor should have one parameter called shift. Define the method encode so that each letter is shifted by the value in shift. For example, if shift is 3, a will be replaced by d, b will be replaced by e, c will be replaced by f, and so on. (Hint: You may wish to define a private method that shifts a single character.)
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- Create a Right Triangle class that has two sides. Name your class rightTraingle. Code getter and setters for the base and the height. (Remember class variables are private.) The class should include a two-argument constructor that allows the program to set the base and height. The constructor should verify that all the dimensions are greater than 0. before assigning the values to the private data members. If a side is not greater than zero, set the value to -1. The class also should include two value-returning methods. One value-returning method should calculate the area of a triangle, and the other should calculate the perimeter of a triangle. If either side is -1, these functions return a -1. The formula for calculating the area of a triangle is 1/2 * b*h, where b is the base and h is the height. The formula for calculating the perimeter of a triangle is b+h+sqrt (b*b+h*h). Be sure to include a default constructor that initializes the variables of the base, height to -1. To test…A. Writing an Interface In this problem you will first write an interface and then modify classes to implement the interface. Write an interface, GeometricSolid, which has one method, volume. The volume method takes no arguments and returns a double. You are provided with three classes: Cylinder, Sphere, and RightCircularCone Modify the classes so that they implement the GeometricSolid interface. Supply the appropriate method for each class. You can use Google search to find the formula for the volume. Make sure that you use Math.PI in your calculations. Notice in InterfaceRunner that the objects are added to an ArrayList of GeometricSolids. since I couldn't fit all images with two screen shots I left the link here link: https://codecheck.it/files/18040616319p6jy6gzkdzuq08nmlp81251tThe following is a class definition for a simple Ebook. Two instance variables and one parameterless constructor are provided. Part 1: Write a second constructor that takes a String array of pages as input and sets the String array instance variable equal to the input. Continue to default the current page number to zero. Part 2: Write a getter and a setter method for the page number variable. The setter should check to make sure that the input is a valid page number and only update the variable if the new value is valid. Part 3: Write a getCurrentPage method that returns the String of the current page indexed by current_page. public class Ebook{ private String[] pages; private int current_page; //constructor public Ebook() { this.pages = {"See Spot.", "See Spot run.", "Run, Spot, run."}; this.current_page = 0; }}
- 5. Given the Java Point class (which contains two private variables x and y and constructors that allows creating a point object with known x and y values as well as other methods such as equals( ), toString( ) etc), (a). define a new class called Circle that contains private two variables: center which is a Point object from the Point class and radius which is of type double. The Circle class must have the following methods: (b). add a constructor which creates a circle object using a center point with x and y values and a radius as its parameters. (c). add a default constructor. ( (d). add an equals() method that can compare if any object is equal to a Circle object (two circle objects are equal if they have the same center point with the same radius). (e). add a toString() method that prints a Circle object with the center point and radius.please may you : create a Python class named Animal with properties for name, age, and a method called speak. also include an initializer method for the class and demonstrate how to create an instance of this class. and extend the Animal class by adding a decorator for one of its properties (e.g., age). please include both a getter and a setter for the property, and demonstrate error handling.Java- Suppose that Vehicle is a class and Car is a new class that extends Vehicle. Write a description of which kind of assignments are permitted between Car and Vehicle variables.
- 30. True or False: The parameterized constructors of Java does not accept any parameters instead, using these constructors the instance variables of a method will be initialized with fixed values for all objects. False True Give an explanation for the answer. Thank youDo the following in Java and provided source code with screenshots of correct output to show it works! (New Solution without AI) 1. Create an interface Vehicle that contains three void, abstract methods named Start, Stop and Change Speed. 2 .Create an Airplane class (not abstract) that uses the Vehicle interface in Q1. The code for all methods should print simple messages to the screen using System.out.println(). Add an integer speed variable that is changed using the Change Speed method. ChangeSpeed adds 5 to the speed each time it is called. Create a default constructor that sets the initial speed to 0. Don't create other constructors or any setter/getter methods. 3. Create an abstract class Car that also uses the Vehicle interface in Q1 and has three variables, Year, Make, and Speed. Include the following: One constructor that accepts the car's year and make as arguments. The constructor should also assign 0 to the speed variable. Do not create other constructors. Create a void…82. Write a class definition for a class named Fraction that contains two integer fields named numerator and denominator. Include in the class a prototype for a method (function) named add that takes two Fraction objects as input arguments and returns a Fraction object as output. You do not need to provide an implementation of the add method.
- Can you implement an interface in your class? A solution is placed in the "solution" section to help you, but we would suggest you try to solve it on your own first. Problem Statement# You are given an interface Addition which contains a method signature int add(int num1, int num2). You need to write a class called Calculator which implements the Addition interface. The add(int, int) method takes two integers and returns their sum. Input# Calls the add(int, int) method by passing num1 and num2. Output# Returns the addition of num1 and num2.Part (1) Define a class as follow: a. create a class called Student that has four instance variables - a (String) name, a (long) StudentID, a (String) College, and a (double) GPA. b. A constructor that takes student name, StudentID, College and GPA. The constructor sets the class variables to these values . c. Make the instance variable GPA private and provide a mutator method (set) and an accessor method (get) to access this variable. In set method if the GPA negative or grater than 4.00 print an invalid message and do not change the instance variable GPA. d. A method Student_Status () that check the GPA if it is less than 2, display the warning message, otherwise display Normal student. e. A method Print() that displays the name, StudentID, College and GPA of the student as shown below: Sample output: Enter the Student name: Ali Ahmed Enter the Student ID: 20180011 Enter the College: Information Technology Enter the GPA: 3.2 Normal student Name: Ali Ahmed Student ID: 20180011…Part (1) Define a class as follow: a. create a class called Student that has four instance variables - a (String) name, a (long) StudentID, a (String) College, and a (double) GPA. b. A constructor that takes student name, StudentID, College and GPA. The constructor sets the class variables to these values . c. Make the instance variable GPA private and provide a mutator method (set) and an accessor method (get) to access this variable. In set method if the GPA negative or grater than 4.00 print an invalid message and do not change the instance variable GPA. d. A method Student_Status () that check the GPA if it is less than 2, display the warning message, otherwise display Normal student. e. A method Print() that displays the name, StudentiD, College and GPA of the student as shown below: Sample output: Enter the Student name: ALİ Ahmed Enter the Student ID: 20180011 Enter the College: Information Technology Enter the GPA: 3.2 Normal student Name: Ali Ahmed Student ID: 2018ee11…