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

Create an interface MessageDecoder that has a single abstract method decode(cipherText), where cipherText is the message to be decoded.The method will returnthe decoded message. Create a class SubstitutionCipher that implements the interface MessageDecoder as described above. The constructorshould have one parameter called shift. Define the method decode so that each letter is shifted by the value in the shif. For example, if shift is 3, a will be replaced by d, b will be replaced bt e, c will be replaced by f, and so on. Hint: You may wish to define a private methodthat shifts a single character. Create a class ShuffleCipher that implements the interface MessageDecoder. The constructor should haveone parameter called n. Define the method decode so that the message is shuffledn times.To perform one shuffle, split the message in half and then take the charactersfrom each half alternatively. For example, if the messsage is "abcdefghi", the halves are "abcde" and "fghi". The shuffled…
15. Create an interface MessageEncoder that has a single abstract method encode (plainText), where plainText is the message to be encoded. The method will return the encoded message.
This way, any class that implements the Visible interface can define its own behavior for making an object visible or invisible based on its specific requirements.Create the Priority Java interface, which has the methods setPriority and getPriority. A method for determining numerical priority among a group of objects should be defined by the interface. Create and implement a class named Task that represents a task that implements the Priority interface, such as one that is on a to-do list. To test some Task objects, construct a driver class.
Create an interface MessageEncoder that has a single abstract method encode(plainText), where plainText is the message to be encoded. The method will return the encoded message.
Java
Java Question.
Java with screen shot please
This way, any class that implements the Visible interface can define its own behavior for making an object visible or invisible based on its specific requirements.Create a Priority Java interface with two methods: setPriority and getPriority. The interface should define a method for assigning numerical priority to a group of objects. Create a class named Task that represents a task (such as one on a to-do list) that implements the Priority interface. Make a driver class to test certain Task objects.
Use java language
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).
Create a Java class called Student with attributes name, age, and grade. Implement a parameterized constructor to initialize these attributes. Then, create an array of Student objects, populate it, and print the details of all students.
Implement a superclass Person. Make two classes, Student and Instructor, that inherit from Person. A person has a name and a year of birth. A student has a major, and an instructor has a salary. Write the class declarations, the constructors, and the Supply a methods toString for all classes. test program for these classes and methods.