ROT13 Cipher tool

ℹ️ technologies used

• Java

Encrypt

Decrypt

private void cipherDecipher(String message, int offset){
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < message.length(); i++) {
            char c = message.charAt(i);
            if       (c >= 'a' && c <= 'm') c += offset;
            else if  (c >= 'A' && c <= 'M') c += offset;
            else if  (c >= 'n' && c <= 'z') c -= offset;
            else if  (c >= 'N' && c <= 'Z') c -= offset;
            sb.append(c);
        }
        textAreaOutput.setText(sb.toString());
}

📚 References

https://stackoverflow.com/questions/25537465/rot13-decode-in-java

https://en.wikipedia.org/wiki/ROT13