5. Create an interface MessageDecoder that has a single abstract method decode(cipher Text), where cipher Text is the message to be decoded. The method will return the decoded message. Modify the classes 8.5 Graphics Supplement SubstitutionCipher and ShuffleCipher, as described in Exercises 16 and 17, so that they implement Message Decoder as well as the interface MessageEncoder that Exercise 15 describes. Finally, write a program that allows a user to encode and decode messages entered on the keyboard. 703

5. Create an interface MessageDecoder that has a single abstract method decode(cipher Text), where cipher Text is the message to be decoded. The method will return the decoded message. Modify the classes 8.5 Graphics Supplement SubstitutionCipher and ShuffleCipher, as described in Exercises 16 and 17, so that they implement Message Decoder as well as the interface MessageEncoder that Exercise 15 describes. Finally, write a program that allows a user to encode and decode messages entered on the keyboard. 703

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

Write a BSTApp JAVA class to create and manipulate a BST object (making the different method calls). Create the BST by inputting 60, 70, 20, 10, 40, 50, 30 in an initially empty BST.
The question is p8. 2
For the Assignment 5 (Part 2), Routes v.2 at the end of this module you will create a Route class that has a member a "bag" of Leg objects. The bag is to use a vector of pointers, but since all the objects in the bag are to be Leg s, it's okay to use Leg* instead of void* in the bag's declaration. You wrote its first constructor in a previous exercise. Now write a second one. (You may refer to the Assignment page to refer to the completed class declarations of Leg and Route classes). Assume that class Leg has data member C strings const char* const beginCity; and const char* const endCity; that are available to Route by a friend relationship. Write a constructor function for a Route class that takes exactly two parameters: a constant Route object reference to an already-existing Route , and a constant Leg object reference to be appended to the end of that Route to form the new Route . Here's the algorithm: Copy the first parameter's bag into the host object's bag. If the endCity of…
please answer with output
53. Write a class with two instance variables, representing an old password and a new password. Write a recursive method that returns the number of places where the two passwords have different characters. The passwords can have different lengths. Write another, nonrecursive method returning whether the two passwords are sufficiently different. The method takes an int parameter indicating the minimum number of differences that qualify the passwords as being sufficiently different. Your program should include a client class to test your class.
Please write a Java program with at least two classes. Use a circle to represent it! The class should have at least one non-static setter method and one non-static getter. Implement at least one method test that invokes the setter method and the corresponding getter method so that the value out == the value in!
P8.2 Implement a class Quiz that implements the Measurable interface. A quiz has a score and a letter grade (such as B+). Use the Data class of Exercise P8.1 to process an array of quizzes. Display the average score and the quiz with the highest score (both letter grade and score).
1) Implement a class Moth that models a moth flying along a straight line. The moth hasa position, which is the distance from a fixed origin. When the moth moves toward apoint of light, its new position is halfway between its old position and the position ofthe light source. Find the instance variable(s), define and implement the constructor(s), then supplythe following methods:- public void moveToLight(double lightPosition) - public double getPosition()2) Document your class, generate Javadoc documentation and produce a test program ‘MothTester’that construct a moth, move it toward a couple of light sources, and check that the moth’s positionis as expected. 3) Add a comment to your class Moth that explains how you can make the Moth immobile after 10moves.
Define a BankAccount classthat has• accNum (int)• Balance (double)• A constructor• Four methodso deposito withdrawo getAccNumo getBalance 2. Implement a test classTestBankAccount that• Initialize an BankAccountinstance with initial values:• deposit: 500.0• accNum: 1001• Deposit 30.50• Withdraw 50.0• Print out the remainingbalance
USING JAVA Write these: An interface called Shape that has two methods: area and perimeter. A class Rectangle that implements Shape and has a length and a width. A class Circle that implements Shape and has a radius. For each class, write the needed constructors, getters, setters, and a toString method that stringifies the instance variables in a readable format. Supply a test program that instantiates an instance of each class and exercises each method defined for the class.
2.Write a java program that define a class named smartPhone . It is implemented from interfaces mobile and tablet. Moblie contain methods canCall() and simType(). Tablet contain noOfApps(). Test this class in main.
Add the following methos to the class Person(code bellow) in Python: a) Add a method isDescendant(personID) to Person which takes a person identifier string as an argument and returns True if the identified person is an descendant of self or False if this is not the case. The answer should be True when the identified person is self. b) Add a method printAncestors() to Person that does what its name suggests. You aren't likely to manage to make this look as good as the output of printDescendants, but each line should include some indication how many generations up the tree the ancestor is. Just starting the line with a number and appropriate indentation is sufficient. from collections import namedtuple class Person(): # Stores info about a single person # Created when an Individual (INDI) GEDCOM record is processed. #------------------------------------------------------------------- def __init__(self,ref): # Initializes a new Person object, storing the string…