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

              if ((nBytesWritten + buffer.length) > nBytes) {
                // calculate byte count needed to exactly hit nBytes in length
                //  to keep randomDataGenerator in sync during the verify step
                int pb = (int) (nBytes - nBytesWritten);
                byte[] bufferPartial = new byte[pb];
                randomDataGenerator.nextBytes(bufferPartial);
                nos.write(bufferPartial);
              } else {
                randomDataGenerator.nextBytes(buffer);
                nos.write(buffer);
              }

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                int pb = (int) (nBytes - nBytesWritten);
                byte[] bufferPartial = new byte[pb];
                randomDataGenerator.nextBytes(bufferPartial);
                nos.write(bufferPartial);
              } else {
                randomDataGenerator.nextBytes(buffer);
                nos.write(buffer);
              }
            }
          } finally {
            nos.flush();

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          int m = 42;
          try {
            while (m != -1) {
              m = nis.read(buffer);
              if (m == buffer.length) {
                randomDataGenerator.nextBytes(bufferGolden);
                assertBytesEqual(buffer, bufferGolden, buffer.length);
              } else if (m > 0) {
                byte[] bufferGoldenPartial = new byte[m];
                randomDataGenerator.nextBytes(bufferGoldenPartial);
                assertBytesEqual(buffer, bufferGoldenPartial, bufferGoldenPartial.length);

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              if (m == buffer.length) {
                randomDataGenerator.nextBytes(bufferGolden);
                assertBytesEqual(buffer, bufferGolden, buffer.length);
              } else if (m > 0) {
                byte[] bufferGoldenPartial = new byte[m];
                randomDataGenerator.nextBytes(bufferGoldenPartial);
                assertBytesEqual(buffer, bufferGoldenPartial, bufferGoldenPartial.length);
              }
            }
          } finally {
            nis.close();

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   }


   private byte[] generateKey(int i) {
      Random r = new Random();
      byte[] result = new byte[i];
      r.nextBytes(result);
      return result;
   }
}

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    FSDataOutputStream stm = fileSys.create(name, true,
        fileSys.getConf().getInt("io.file.buffer.size", 4096),
        (short)repl, (long)blockSize);
    byte[] buffer = new byte[fileSize];
    Random rand = new Random(seed);
    rand.nextBytes(buffer);
    stm.write(buffer);
    stm.close();
  }

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        Random r = new Random(6032405);
        int length = 1024*64+1;
        byte[] data = new byte[length];
        RandomAccessBucket bucket = (RandomAccessBucket) makeBucket(length);
        OutputStream os = bucket.getOutputStream();
        r.nextBytes(data);
        for(int written=0;written<length;) {
            int toWrite = Math.min(length - written, 4095);
            os.write(data, written, toWrite);
            written += toWrite;
        }

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        Random r = new Random(6032405);
        int length = 1024*64+1;
        byte[] data = new byte[length];
        RandomAccessBucket bucket = (RandomAccessBucket) makeBucket(length);
        OutputStream os = bucket.getOutputStream();
        r.nextBytes(data);
        for(int written=0;written<length;) {
            int toWrite = Math.min(length - written, 4095);
            os.write(data, written, toWrite);
            written += toWrite;
        }

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        Random r = new Random(6032405);
        int length = 1024*64+1;
        byte[] data = new byte[length];
        RandomAccessBucket bucket = (RandomAccessBucket) makeBucket(length);
        OutputStream os = bucket.getOutputStream();
        r.nextBytes(data);
        for(int written=0;written<length;) {
            int toWrite = Math.min(length - written, 4095);
            os.write(data, written, toWrite);
            written += toWrite;
        }

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    @Test
    public void testStoreTo() throws IOException, StorageFormatException, ResumeFailedException, GeneralSecurityException {
        File tempFile = File.createTempFile("test-storeto", ".tmp", base);
        byte[] buf = new byte[4096];
        Random r = new Random(1267612);
        r.nextBytes(buf);
        FileBucket fb = new FileBucket(tempFile, false, false, false, true);
        EncryptedRandomAccessBucket erab = new EncryptedRandomAccessBucket(types[0], fb, secret);
        OutputStream os = erab.getOutputStream();
        os.write(buf, 0, buf.length);
        os.close();

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