CipherGUI/Cipher.java at main · AlexaJavaDev/CipherGUI · GitHub

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public class Cipher {

public static void main(String[] args) {

String str = "";

String enc = encrypt(str);

System.out.println(str + " " + enc + " " + decrypt(enc));

}

public static String encrypt(String text) {

String result = "";

for (int i = 0; i < text.length(); i++) {

char c = text.charAt(i);

if (c >= 'a' && c <= 'z') {

if (c == 'z') c = 'a';

else c = (char) (c + 1);

}

else if (c >= 'A' && c <= 'Z') {

if (c == 'Z') c = 'A';

else c = (char) (c + 1);

}

result += c;

}

return result;

}

public static String decrypt(String text) {

String result = "";

for (int i = 0; i < text.length(); i++) {

char c = text.charAt(i);

if (c >= 'a' && c <= 'z') {

if (c == 'a') c = 'z';

else c = (char) (c - 1);

}

else if (c >= 'A' && c <= 'Z') {

if (c == 'A') c = 'Z';

else c = (char) (c - 1);

}

result += c;

}

return result;

}

CipherGUI/Cipher.java at main · AlexaJavaDev/CipherGUI · GitHub

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