CryptoGrapy Morse [dev003] (CM 110)

Kali ini kita akan membuat criptographi sederhana, yaitu programming persandian yang sering kita gunakan saat pramuka yaitu sandi morse.

A : .- J : .--- S : ... 2 : .----
B : -... K : -.- T : - 3 : ...--
C : -.-. L : .-.. U : ..- 4 : ....-
D : -.. M : -- V : ...- 5 : .....
E : . N : -. W : .-- 6 : -....
F : ..-. O : --- X : -..- 7 : --...
G : --. P : .--. Y : -.-- 8 : ---..
H : .... Q : --.- Z : --.. 9 : ----.
I : .. R : .-. 1 : .---- 0 : -----

atau untuk lebih jelas dapat melihat gambar berikut :


Kita akan berlatih membuat program kriptographi sederhana ini :
bagi yang ingin mencoba hasilnya bisa ke situs :



website :

Code:

http://morsecode.scphillips.com/jtranslator.html

Sekarang kita coba membuat dengan bahasa pemprograman java sendiri :

Code:

/*
* WhiteMrse.java
* by CyberMuttaqin
* Created On 5, January 2010
*/

import java.util.*;

public class WhiteMorse{
   private String asciiText= "";
   private String morseText = "";

   //True konfersi dai ascii ke morse
   // konfersi dai morse ke ascii
   private boolean fDirect = true;

   private static int NR_CHARS = 36;
   private static char[] ch = {
   ' ','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
   '1','2','3','4','5','6','7','8','9','0'};

   private static String[] mc = {
     null,
     ".-",     //A
     "-...",     //B
     "-.-",     //C
     "-..",     //D
     ".",     //E
     "..-",     //F
     "--.",     //G
     "....",     //H
     "..",     //I
     ".---",     //J
     "-.-",     //K
     ".-..",     //L
     "--",     //M
     "-.",     //N
     "---",     //O
     ".--.",     //P
     "--.-",     //Q
     ".-.",     //R
     "...",     //S
     "-",     //T
     "..-",     //U
     "...-",     //V
     ".--",     //W
     "-..-",     //X
     "-.--",     //Y
     "--..",     //Z
     
     ".----", //1
     "..---", //2
     "...--", //3
     "....-", //4
     ".....", //5
     "-....", //6
     "--...", //7
     "---..", //8
     "----.", //9
     "-----", //0
          
   };

   //buat instance
   public WhiteMorse(String s, boolean fDirect){
     if (fDirect) {
        this.asciiText = s;
        convertToMorse();
     } else {
        this.morseText = s;
        convertToAscii();
     }
   }

   public String getMorse(){
     return morseText;
   }

   public String getAscii(){
     return asciiText;
   }

   public String toString(){
     String str = 
         "Text ASCII = " +getAscii()+"\n"+
         "Text Morse = " +getMorse()+"\n";
     return str;
   }

   static void test(){
      System.out.println(new WhiteMorse("CYBERMUTTAQIN",true));
      System.out.println(new WhiteMorse((new WhiteMorse("CYBERMUTTAQIN",true)).getMorse(),false));
   }

   public static void main(String[] args){
      test();
   }

   private int searchMorse(String s){
      int i = NR_CHARS-1;
      mc[0] = s;
      while (!mc[i].equals(s)) i--;
      return i;
   }

    private int searchChar(char ch){
      int i = NR_CHARS-1;
      while (this.ch[i]!=ch)i--;
      return i;
   }

   private void convertToMorse(){
       morseText="";
       for(int i=0;i<asciiText.length(); i++){
       int idx = searchChar(asciiText.charAt(i));
       if (idx ==0){
          morseText += "\t";
       } else {
          morseText += mc[idx];
          morseText += "";
       }
   }
   }

   private void convertToAscii(){
      asciiText = "";
      StringTokenizer TokensA = new StringTokenizer(morseText);
      while (TokensA.hasMoreTokens()){
        String morseWord = TokensA.nextToken("\t");
        StringTokenizer TokensB = new StringTokenizer(morseWord);
        while (TokensB.hasMoreTokens()) {
        int idx = searchMorse(TokensB.nextToken());
        if (idx ==0) {
           asciiText += "";
        } else {
           asciiText += ch[idx];
        }
        }
        asciiText += "";
      }
   } 
 }

yups... jadi dech...
selamat mencoba dan berkreasi semoga bermanfaat...

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