Class CaesarMessage

Object

OpenMessage

CaesarMessage

All Implemented Interfaces:

EncryptedMessage, Message

public class CaesarMessage
extends OpenMessage
implements EncryptedMessage

Field Summary

Fields

Modifier and Type	Field	Description
protected Key	messageKey	Note that all you need to declare here is messageKey, as to, from, subject, and body are handled in OpenMessage, which CaesarMessage inherits fom.

Fields inherited from class OpenMessage

body, from, subject, to

Constructor Summary

Constructors

Constructor	Description
CaesarMessage(String to, String from, String subject, String body, Key key)

Method Summary

Modifier and Type	Method	Description
String	decrypt(String message, Key key)	Decrypts the String passed in.
String	encrypt(String message, Key key)	Encrypts the String passed into it using a Caesar Cipher.
static void	main(String[] args)

Methods inherited from class OpenMessage

getBody, getFrom, getSubject, getTo, search, searchFrom, searchSubject, searchTo, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

messageKey

protected Key messageKey

Note that all you need to declare here is messageKey, as to, from, subject, and body are handled in OpenMessage, which CaesarMessage inherits fom.

Constructor Details

CaesarMessage

public CaesarMessage(String to,
 String from,
 String subject,
 String body,
 Key key)

Method Details

encrypt

public String encrypt(String message,
 Key key)

Encrypts the String passed into it using a Caesar Cipher. Implemented in Lab 12, all you need to do is modify it from being in OpenMessage to being in CaesarMessage, specifically with the changes to Key.

Example output:

         Key key = new Key("hatter","3","C");
         CaesarMessage message1 = new CaesarMessage("Hatter", "Red", "New Hat", "Hatter, I need a new hat, and if I don't get it, you won't need one.", key);
         System.out.println(message1.encrypt(message1.getBody(), key));
           

• Code line prints Kdwwhu/#L#qhhg#d#qhz#kdw/#dqg#li#L#grq*w#jhw#lw/#|rx#zrq*w#qhhg#rqh1

Specified by:

encrypt in interface EncryptedMessage

Parameters:

message - String to encrypt

key - Key used to encrypt the message

Returns:

String containing encrypted message

decrypt

public String decrypt(String message,
 Key key)

Decrypts the String passed in. Implemented in Lab 12. Only minor changes need to be made to make it fit CaesarMessage and the Key changes.

Example output:

         Key key = new Key("hatter","3","C");
         CaesarMessage message1 = new CaesarMessage("Hatter", "Red", "New Hat", "Hatter, I need a new hat, and if I don't get it, you won't need one.", key);
         String encrypted = "Kdwwhu/#L#qhhg#d#qhz#kdw/#dqg#li#L#grq*w#jhw#lw/#|rx#zrq*w#qhhg#rqh1";
         System.out.println(message1.decrypt(encrypted, key));
           

• First line prints Hatter, I need a new hat, and if I don't get it, you won't need one.

Specified by:

decrypt in interface EncryptedMessage

Parameters:

message - String to decrypt

key - Key used to decrypt the message

Returns:

String containing decrypted message

main

public static void main(String[] args)