ibHVpEb9

1import java.util.*;
2
3public class CaesarCipher {
4
5	static Scanner scan = new Scanner(System.in);
6	
7	public static void main (String args[]) {
8	
9		
10		System.out.print("Please enter the message you would like to encrypt: ");
11		String originalMessage = scan.nextLine();
12	
13		System.out.print("Please enter your secret key: ");
14		int secretKey = scan.nextInt();
15		
16		encryptMessage(originalMessage, secretKey);
17		
18		scan.nextLine();
19		
20		System.out.print("\nPlease enter the message you would like to decrypt: ");
21		String userEncryptedMessage = scan.nextLine();
22		
23		System.out.print("Please enter your secret key: ");
24		int secretKey2 = scan.nextInt();
25		
26		decryptMessage(userEncryptedMessage, secretKey2);
27	}
28	
29	public static String encryptMessage (String originalMessage, int secretKey) {
30		String encryptedMessage = "";
31
32		for (int i = 0; i < originalMessage.length(); i++) {
33			if (originalMessage.charAt(i) > 64 && originalMessage.charAt(i) < 91) {
34				char ch = (char)((int)(originalMessage.charAt(i) + (secretKey - 65)) % 26 + 65);
35				encryptedMessage += ch;	
36			}
37			else {
38			encryptedMessage += originalMessage.charAt(i);
39			}
40		}
41		//Prints user encrypted message
42		System.out.println(encryptedMessage);
43		
44		return encryptedMessage;
45	}
46
47	public static String decryptMessage (String userEncryptedMessage, int secretKey2) {
48		String decryptedMessage = "";
49		
50		for (int i = 0; i < userEncryptedMessage.length(); i++) {
51			if (userEncryptedMessage.charAt(i) > 64 && userEncryptedMessage.charAt(i) < 91) {
52				char ch = (char)((int)(userEncryptedMessage.charAt(i) + (secretKey2 - 65)) % 26 + 65);
53				decryptedMessage += ch;	
54			}
55			else {
56			decryptedMessage += userEncryptedMessage.charAt(i);
57			}
58		}
59		//Prints user encrypted message
60		System.out.println(decryptedMessage);
61		return decryptedMessage;
62	}
63
64	public void identifyKeys (String encryptedMessage, char letter, int numberOfTimes) {
65		
66		
67	}
68	
69	
70}