Enigma

package com.company;

import java.util.*;

public class enigma3 {

    public static void main(String[] args) {
        //String str = new String("");
        String str = new String("I have to put data");
        int[] code =  generateRandomCode(str.length());
        int[] code2 =  new int[]  {11, 9, 2, 16, 6, 7, 4, 5, 3, 12, 14, 10, 15, 17, 13, 0, 1, 8};
        System.out.println("code: " + Arrays.toString(code));

        //decypher(cypher(str,code),code);
        cypher(str, code2);
        decypher("\u0080)j\u0084&{zjd\u0080rzpr-I!w",code2);
    }

    public static String cypher(String str, int[] iArr){
        char[] cArr = str.toCharArray();
        char[] result = new char[cArr.length];
        int ascii;

        for (int i = 0; i < cArr.length ; i++) {
            result [i] = cArr[ iArr[i] ];
            ascii = (int) result [i];
            ascii += iArr[i];
            result [i] = (char) ascii;
        }
        System.out.println();
        System.out.println("cyphered: " + new String(result));

        return new String(result);
    }

    public static String decypher(String str, int[] iArr){
        char[] cArr = str.toCharArray();
        char[] result = new char[cArr.length];
        int ascii;

        for (int i = 0; i < cArr.length ; i++) {
            result[ iArr[i] ] = cArr[i];
            ascii = (int) result [iArr[i]];
            ascii -= iArr[i];
            result [iArr[i]] = (char) ascii;
        }
        System.out.println();
        System.out.println("decyphered: " + new String(result));

        return new String(result);
    }

    public static int[] generateRandomCode(int length){
        int[] iArr = new int[length];
        Set<Integer> generated = new LinkedHashSet<Integer>();
        Random rng = new Random();

        while (generated.size() < length) {
            Integer next = rng.nextInt(length) + 0;
            generated.add(next);
        }

        List<Integer> list = new ArrayList<Integer>(generated);

        for (int i = 0; i < length; i++) {
            iArr[i] = list.get(i);
        }
        return iArr;
    }
}