Examples of java.util.Random.nextBytes()

java.util.Random.nextBytes()
Generates random bytes and places them into a user-supplied byte array. The number of random bytes produced is equal to the length of the byte array.
The method {@code nextBytes} is implemented by class {@code Random}as if by:
```
  {@code}public void nextBytes(byte[] bytes)  for (int i = 0; i < bytes.length; ) for (int rnd = nextInt(), n = Math.min(bytes.length - i, 4); n-- > 0; rnd >>= 8) bytes[i++] = (byte)rnd; }}
```
@param bytes the byte array to fill with random bytes @throws NullPointerException if the byte array is null @since 1.1

    }
    
    public static void main(String[] args) {
      byte[] b = new byte[16];
    Random random = new Random();
    random.nextBytes(b);
    System.out.println(HexString.toHexString(b));
    System.out.println(TypeUtil.toString(b, 16));
  }
}

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        Random rnd = new Random();
        int width = 5;
        int height = 5;
        int bpp = 3;
        byte[] raw = new byte[width * height * bpp];
        rnd.nextBytes(raw);
        System.out.println("raw:   ");
        dump(raw);
        for (int i = 10; i < 15; i++) 
        {
            byte[] decoded = new byte[width * height * bpp];

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      // generate it or repeat, it should compress well
      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        row = keyValues.get(randomizer.nextInt(keyValues.size())).getRow();
      } else {
        row = new byte[FIELD_LENGTH];
        randomizer.nextBytes(row);
      }
      if (0 == i) {
        family = new byte[FIELD_LENGTH];
        randomizer.nextBytes(family);
      } else {

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        row = new byte[FIELD_LENGTH];
        randomizer.nextBytes(row);
      }
      if (0 == i) {
        family = new byte[FIELD_LENGTH];
        randomizer.nextBytes(family);
      } else {
        family = keyValues.get(0).getFamily();
      }
      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        qualifier = keyValues.get(

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      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        qualifier = keyValues.get(
            randomizer.nextInt(keyValues.size())).getQualifier();
      } else {
        qualifier = new byte[FIELD_LENGTH];
        randomizer.nextBytes(qualifier);
      }
      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        value = keyValues.get(randomizer.nextInt(keyValues.size())).getValue();
      } else {
        value = new byte[FIELD_LENGTH];

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      }
      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        value = keyValues.get(randomizer.nextInt(keyValues.size())).getValue();
      } else {
        value = new byte[FIELD_LENGTH];
        randomizer.nextBytes(value);
      }
      if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
        timestamp = keyValues.get(
            randomizer.nextInt(keyValues.size())).getTimestamp();
      } else {

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  public void testToStringBytesBinaryReversible() {  
    //  let's run test with 1000 randomly generated byte arrays
    Random rand = new Random(System.currentTimeMillis());
    byte[] randomBytes = new byte[1000];
    for (int i = 0; i < 1000; i++) {
      rand.nextBytes(randomBytes);
      verifyReversibleForBytes(randomBytes); 
    }
    
        
    //  some specific cases

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                int length = gen.nextInt() & LENGTH_MASK;
                IndexOutput file = store.createOutput(name);
                byte[] data = new byte[length];


                totalLength += length;
                gen.nextBytes(data);
                file.writeBytes(data, length);


                file.close();
            }
        } catch (IOException e) {

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                if (file.length() != length)
                    throw new Exception("length incorrect");


                byte[] data = new byte[length];
                byte[] read = new byte[length];
                gen.nextBytes(data);
                file.readBytes(read, 0, length);


                if (!Arrays.equals(data, read))
                    throw new Exception("contents incorrect");

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  @Test
  public void testEchoBytes() throws IOException {
    Random random = new Random();
    int length = random.nextInt(1024*16);
    byte[] data = new byte[length];
    random.nextBytes(data);
    byte[] echoed = proxy.echoBytes(data);
    assertArrayEquals(data, echoed);
  }


  @Test

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