Here’s a solid you can use or adapt, highlighting Hutool 3.9.x (assuming you meant 3.9, as Hutool hasn’t reached 39 yet — but if you meant something else, feel free to clarify).

Update to Hutool 6.0.0.M39 today. Your fingers (and your CPU) will thank you.

implementation 'cn.hutool:hutool-all:6.0.0.M39'

The new HexUtil.format(byte[]) outputs similar to Linux's xxd :

┌────────────────────────────────────────────────────────┐ │ HUTOOL 5.8.39 MAJOR UPGRADES │ ├────────────────────────────────────────────────────────┤ │ [AI Platform] -> Stream callbacks & multi-model │ │ [Data Security] -> Passport & ID obfuscation tools │ │ [Concurrency] -> Recyclable batch thread pooling │ │ [Database] -> Global FetchSize parameter rules │ └────────────────────────────────────────────────────────┘ 1. Launch of the HutoolAI Platform

: Available in multiple colors, including pink, which some users find helps prevent "borrowing" by other family members. Pros and Cons Extremely affordable for the number of pieces included. Not intended for heavy-duty or professional use . Lightweight and compact for easy storage in drawers.

: While functional for light tasks, some users note the tools feel less robust than high-end brands; specifically, screwdriver tips may be shorter than standard industrial versions.

To implement these updates, add the latest artifact configuration inside your build management tool files. Maven Installation

The most significant change in the new era of Hutool is its package naming registry. Hutool officially integrated into the (a premier non-profit community for highly-utilized Java frameworks). Package Relocation