Hutool 39 New [top] (2026)

Hutool is a popular open-source Java tool library that simplifies development by encapsulating common code into static methods Because Hutool is currently in its (and actively developing

• CollUtil.forEach(...) with Index: Finally, a way to iterate a map or list with an index counter without managing the integer yourself.
• CollUtil.newHashSet(T... values): While trivial, the 3.9 version optimized the initial capacity, eliminating the dreaded "rehashing" performance penalty for sets with known sizes.

Expanded Assertions: The Assert class received updates to include methods for verifying if collections are empty, improving test code readability. hutool 39 new

In this article, we will dissect every major component of the Hutool 39 new release, provide migration tips, and show you how to cut your lines of code by 60% using these updates. Hutool is a popular open-source Java tool library

1. The delta: What changed from 3.8 to 3.9?
2. Migration safety: Does this break my existing code?
3. The killer features: What utility can I delete from my own org.util package?

If you are looking to stay at the cutting edge of Java utility libraries, here is a deep dive into what’s new and why it matters. 1. The AI Revolution: SSE and Multi-Model Support CollUtil

provided safer and easier-to-use wrappers for common encryption algorithms, reducing the risk of implementation errors. JSON Handling hutool-json

Looking for more details? You can find the full changelog and documentation on the official Hutool Release Page or at Hutool.cn. hutool/README-EN.md at v5-master - GitHub

Quick Refresher: What is Hutool?

For the uninitiated, Hutool is a lightweight Java utility library that complements the JDK. Think of it as Guava, but with a distinctly Chinese open‑source flavor and an obsessive focus on reducing boilerplate. It doesn’t reinvent the wheel – it just makes the wheel roll smoother.