You need java crypto api, I have given you a simple example here that
you could use if you are not already familiar with the API.
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.CipherSpi;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKeyFactory;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
...
public byte[] encrypt(byte[] input, String password) {
try {
byte[] key = password.getBytes();
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "AES"));
return cipher.doFinal("Hello World".getBytes());
} catch (InvalidKeyException e) {
throw new RuntimeException(e);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
} catch (NoSuchPaddingException e) {
throw new RuntimeException(e);
} catch (IllegalBlockSizeException e) {
throw new RuntimeException(e);
} catch (BadPaddingException e) {
throw new RuntimeException(e);
}
}
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