Based on the version numbering conventions of the Hutool project, . The Hutool project skipped from version 3.x (3.2.x) directly to 4.x (4.0.0) around late 2017/early 2018.
In the ecosystem of Java development, efficiency is often measured by how much "boilerplate" code you can eliminate. For years, has stood out as a premier "Swiss Army Knife" for Java developers, providing a comprehensive set of utilities that simplify everything from file manipulation to cryptographic operations. Hutool 3.9 UPD
Could you clarify if you're looking for this for a or if "3.9 UPD" refers to a specific internal project name at your company? I can help you find the exact migration path if you're upgrading. chinabugotech/hutool: A set of tools that keep Java sweet. Based on the version numbering conventions of the