• Source 
    1. /* package whatever; // don't place package name! */
    2.  
    3. /* Name of the class has to be "Main" only if the class is public. */
    4. class Ideone
    5. {
    6. 	static char decrypt(char c, int k)
    7. 	{
    8. 		return (char)(((int)(c-'A')+26-k)%26+'a');
    9. 	}
    10. 	public static void main (String[] args) throws java.lang.Exception
    11. 	{
    12. 		String cipher="AJY";
    13. 		char cipherAlphabet[]=cipher.toCharArray();
    14. 		for(int k=1; k<26; k++)
    15. 		{
    16. 			System.out.print(k+"--->");
    17. 			for(int i=0; i<cipherAlphabet.length; i++)
    18. 			{
    19. 				System.out.print(decrypt(cipherAlphabet[i],k));
    20. 			}
    21. 			System.out.println();
    22. 		}
    23.  
    24. 	}
    25. }