66 lines
1.8 KiB
Java
66 lines
1.8 KiB
Java
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package Crypter;
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import java.util.HashMap;
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/**
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* Implementierung des Crypter-Interfaces.
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*/
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public class CrypterImpl implements Crypter {
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private HashMap<String, String> clear = new HashMap<String, String>();
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public CrypterImpl() {
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for (int i = 0; i < CLEAR_ALPHABET.length(); i++) {
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String zw2 = CYPHER_ALPHABET.charAt(i) + "";
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String zw1 = CLEAR_ALPHABET.charAt(i) + "";
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clear.put(zw1, zw2);
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}
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}
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@Override
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public String encrypt(String input) {
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if (input.equals(null)) {
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return null;
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} else {
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input = input.toLowerCase();
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String result = "";
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for (int i = 0; i < input.length(); i++) {
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if (clear.containsKey(input.charAt(i) + "")) {
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result += clear.get(input.charAt(i) + "");
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} else if (input.charAt(i) == '!'
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|| input.charAt(i) == '('
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|| input.charAt(i) == ')'
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|| input.charAt(i) == '/') {
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String a = "Dieser Block muss leer bleiben, weil"
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+ "dort nichts passieren darf.";
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} else {
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result += input.charAt(i) + "";
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}
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}
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return result;
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}
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}
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@Override
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public String decrypt(String input) {
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for (int i = 0; i < input.length(); i++) {
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if (input.charAt(i) == '!'
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|| input.charAt(i) == 'Ü'
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|| input.charAt(i) == 'Ä'
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|| input.charAt(i) == 'Ö'
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|| input.charAt(i) == '/'
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|| input.charAt(i) == '&'
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|| input.charAt(i) == 'X') {
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return null;
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}
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}
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return encrypt(input);
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}
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}
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