---
title: Java-SDK - 1.4.0
slug: feature-experimentation/release-notes/java-sdk-1-4-0
docTags: 
createdAt: 2026-07-20T15:44:59.064Z
---

\- Add \`sessionId\` parameter to \`activate\` and \`track\` and include in event payload
\- Append datafile \`revision\` to event payload
\- Add support for "Launched" experiment status

[https://github.com/optimizely/java-sdk/releases/tag/1.4.0](https://github.com/optimizely/java-sdk/releases/tag/1.4.0)