# Hashing and Checksums

> StringZilla for Java

```java
long digest = StringZilla.hash(data, 42);

try (StringZilla.Hasher hasher = new StringZilla.Hasher(42)) { // streaming
    hasher.update(firstChunk).update(secondChunk);
    long streamed = hasher.digest();
}

byte[] sha = StringZilla.Sha256.hashData(data); // cf. MessageDigest "SHA-256"
```