xxhash streaming hashing

StreamingXXHash.java

XXHashFactory factory = XXHashFactory.fastestInstance();

byte[] data = "12345345234572".getBytes("UTF-8");
ByteArrayInputStream in = new ByteArrayInputStream(data);

int seed = 0x9747b28c; // used to initialize the hash value, use whatever
                       // value you want, but always the same
StreamingXXHash32 hash32 = factory.newStreamingHash32(seed);
byte[] buf = new byte[8]; // for real-world usage, use a larger buffer, like 8192 bytes
for (;;) {
  int read = in.read(buf);
  if (read == -1) {
    break;
  }
  hash32.update(buf, 0, read);
}
int hash = hash32.getValue();
System.out.println("Streaming hash: " + hash);