Utilities: UUID.nameUUIDFromBytes produces the same UUID for the same input

Unlike UUID.randomUUID, nameUUIDFromBytes is deterministic: it derives a version 3 UUID from the given bytes using MD5, so the same input always produces the same identifier, which suits reproducible keys.

Code

byte[] input = "product-42".getBytes(java.nio.charset.StandardCharsets.UTF_8);
UUID first = UUID.nameUUIDFromBytes(input);
UUID second = UUID.nameUUIDFromBytes(input);
System.out.println("Same input, same UUID: " + first.equals(second));
System.out.println("UUID: " + first);

Output

Same input, same UUID: true
UUID: 8cb108b7-2e2b-3534-8417-2867298a8d37