UUID in Scala

Production-ready implementation guide with CSPRNG-backed code snippets.

Generate UUID in Scala

UUID generation in Scala using the built-in Java UUID class — zero extra dependencies.

Implementation Code

Production Ready

scala snippet

import java.util.UUID

object UUIDExample extends App {
  // UUID v4 — random, CSPRNG-backed
  val id: UUID = UUID.randomUUID()
  println(id.toString)

  // Generate multiple
  val ids: Seq[String] = Seq.fill(5)(UUID.randomUUID().toString)
  ids.foreach(println)
}

Explanation

Scala runs on the JVM and has full access to java.util.UUID with no additional dependencies. UUID.randomUUID() generates a version 4 UUID using SecureRandom internally — cryptographically secure by default.

Output Example

a3f2c1d4-8e7b-4a9f-b6c5-2d1e0f3a4b5c

Best Practice

Use UUID.randomUUID() directly — no wrapper needed. For database primary keys, store as VARCHAR(36) or use the UUID binary type.

Performance

Excellent. JVM's SecureRandom is highly optimised and thread-safe. Suitable for high-throughput services.

Installation

No dependencies required — java.util.UUID is part of the JDK.

// No build.sbt entry needed

Security

Cryptographically secure. Backed by java.security.SecureRandom which uses OS-level entropy (e.g. /dev/urandom).