Hutool 3.9 Jun 2026

Enhancements for Lists, Maps, and Sets.

If you want to make your Java coding experience smoother, tell me:

Hutool 3.9 retains seamless compatibility with legacy Java 7 production systems, whereas modern versions mandate Java 8 or higher.

Lack of robust, chainable utility methods. 3. Hutool 3.9 Core Features Hutool 3.9

, allowing developers to easily implement pruning strategies. : Broad support for manipulation, Collection Networking : Built-in HTTP clients

: Introduced and refined cryptographic tools, simplifying complex operations like symmetric/asymmetric encryption and MD5/SHA hashing. Performance Optimizations

// Convert an array of strings to integers smoothly String[] strArray = "1", "2", "3", "4" ; Integer[] intArray = Convert.toIntArray(strArray); // Safely convert to a string with a fallback default value Object standardObj = null; String result = Convert.toStr(standardObj, "Default Value"); // Convert a number to Chinese Capital Currency format (perfect for finance apps) double amount = 12345.67; String chineseMoney = Convert.digitToChinese(amount); // Output: 壹万贰仟叁佰肆拾伍元陆角柒分 Use code with caution. 2. Time and Date Simplified ( DateUtil ) Enhancements for Lists, Maps, and Sets

If you are looking to manage a specific task regarding this legacy version, let me know:

Perfect for small-scale projects where setting up large frameworks like Spring would be overkill.

Interacting with files can result in a lot of boilerplate (like opening streams, reading bytes, and ensuring everything is closed in a finally block). Hutool handles all of this in the background, offering straightforward methods to read lines, append to files, copy directories, and compute MD5 hashes of files. 5. HTTP Client ( HttpUtil ) Performance Optimizations // Convert an array of strings

The 3.9 release structure is defined by the cn.hutool.core root package, segmented into:

The name "Hutool" is a combination of "Hu" (for tiger in Chinese, representing power and speed) and "Tool". Hutool 3.9 is designed under the philosophy of "minimal sweet spots," aiming to reduce code redundancy and eliminate the need for developers to constantly write repetitive utility classes ( Util.java ).

To fully appreciate any version, one must see where it fits in the library's evolution:

Deep cloning objects and cross-type conversions.

It is designed to be lightweight, avoiding "jar hell" by not forcing other libraries into your project.