title: How good is Java's UUID.randomUUID?
body: <p>I know that randomized <a href="https://en.wikipedia.org/wiki/Universally_unique_identifier" rel="noreferrer">UUIDs</a> have a very, very, very low probability for collision in theory, but I am wondering, in practice, how good Java's <a href="https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html#randomUUID--" rel="noreferrer"><code>randomUUID()</code></a> is in terms of not having collision? Does anybody have any experience to share? </p>