Test Java codes: ```java public class AesCtrTest { public static void main(String[] args) throws Exception { final byte[] key = new byte[]{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; final byte[] iv = new byte[]{ 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0 }; final SecretKeySpec keySpec = new SecretKeySpec(key, "AES"); final Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding"); cipher.init(Cipher.ENCRYPT_MODE, keySpec, new IvParameterSpec(iv)); System.out.println(Bytes.from(cipher.doFinal("hello world".getBytes())).asHex()); System.out.println(Bytes.from(cipher.doFinal( "hello world.hello world.hello world.hello world.hello world.hello world.".getBytes())).asHex()); } } ``` Outputs: ``` 84ad8d80732490c061177a 84ad8d80732490c061177a58bd26d032d6fcff2e66f9afe3cf95717485d3a4485d4a2a7bd835df3d0756b8192e3bf5a287ad8dd81942c43bc812c82d666ebbb34df4e2a5069467d9 ```
Java `nonce` counter: `com.sun.crypto.provider.CounterMode` ```java private static void increment(byte[] nonce) { for(int index = nonce.length - 1; index >= 0 && ++nonce[index] == 0; --index) { } } ```