
Lib 39
Lib39 is a general-purpose dependency library for Minecraft mods.
About this Mod
A LIB
Current Library Features
- S2C Synchronized Data System (Not only supports Capability but also enables synchronization of more data types through DataProvider)
- I18n Language JSON Data Generation Code based on Provider (providing more convenient language data generation)
- Compatibility Code Registration Management Class (for easier compatibility with other mods)
- NBT Read/Write Utility Class using a chain pattern to reduce redundant serialization/deserialization logic
- A Series of Riding Methods for more convenient management of riding relationships
...and a range of other utility methods aimed at reducing repetitive coding tasks.
For Developers
Add the Maven repository in your build.gradle:
repositories {
maven {
name = "LTD Maven"
url = "https://nexus.bot.leisuretimedock.top/repository/maven-public/"
}
}
Import the dependency:
implementation 'top.r3944realms.lib39:lib39:${version}'
Version examples like 1.20.1-0.0.17:
implementation 'top.r3944realms.lib39:lib39:1.20.1-0.0.17'
After building, this mod can be found in the library with examples included.
Click "Download Source Code" in the right-hand window to view JavaDoc annotations.
Available Versions
How to Install Lib 39 on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Lib 39". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.20.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Lib 39 server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Lib 39 compatible with fabric and forge and neoforge?
Lib 39 officially supports fabric, forge, neoforge for Minecraft 1.21.11, 1.21.10, 1.20.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Lib 39 – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Lib 39 consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Similar Mods
Rent Modded Server
Install Lib 39 with just one click on your server.