Practical No-1(c)

Aim: Write a program to implement Monoalphabetic Substitution Cipher Technique.

public class monoalphabetic

{

             public static void main(String[] args)

{

                        String plaintext = "hello";

                        char[] myarr = plaintext.toCharArray();

                        for(int count=0 ; count < myarr.length ; count++)

                        {

                                    char cipher = myarr[count]; 

                                    switch (cipher)

                                    {

 case 'a':

                                                            System.out.print("z");

                                                break;

                                                case 'b':

                                                              System.out.print("y");

                                                 break;

                                                 case 'c':

                                                            System.out.print("x");

                                                 break;

                                                 case 'd':

                                                             System.out.print("w");

                                                break;

                                                case 'e':

                                                             System.out.print("v");

                                                  break;

                                                case 'f':

                                                             System.out.print("u");

                                                 break;

                                                  case 'g':

                                                            System.out.print("t");

                                                break;

                                                case 'h':

                                                            System.out.print("s");

   break;

                                                  case 'i':

                                                             System.out.print("r");

                                                break;

                                                case 'j':

                                                             System.out.print("q");

                                                  break;

                                                case 'k':

                                                            System.out.print("p");

                                                 break;

                                                case 'l':

                                                            System.out.print("o");

                                                   break;

                                                 case 'm':

                                                            System.out.print("n");

                                                break;

                                    case 'n':

                                                System.out.print("m");

                                    break;

                                     case 'o':

                                                   System.out.print("l");

                                    break;

                                      case 'p':

                                                 System.out.print("k");

                                     break;

                                    case 'q':

                                                 System.out.print("j");

                                    break;

                                      case 'r':

    System.out.print("i");

                                      break;

                                     case 's':

    System.out.print("h");

                                      break;

                                      case 't':

                                                   System.out.print("g");

                                     break;

                                      case 'u':

    System.out.print("f");

                                      break;

                                      case 'v':

  System.out.print("e");

                                     break;

                                    case 'w':

                                                   System.out.print("d");

                                     break;

                                    case 'x':

                                                   System.out.print("c");

                                     break;

                                      case 'y':

                                                System.out.print("b");

                                      break;

                                    case 'z':

                                                System.out.print("a");

                                    break;

                                      case ' ':

                                                  System.out.print("1");

                                     break;

   case '1':

                                                  System.out.print(" ");

 }

                         }

}

}