public class CaesarEncryption {
int shift = 13;
public String getEncryptedMessage(String msg) {
StringBuilder builder = new StringBuilder();
for (int i = 0, size = msg.length(); i < size; ++i)
builder.append((char) (msg.charAt(i) + shift));
return builder.toString();
}
public String getDecryptedMessage(String msg) {
StringBuilder builder = new StringBuilder();
for (int i = 0, size = msg.length(); i < size; ++i)
builder.append((char) (msg.charAt(i) - shift));
return builder.toString();
}
}