BKCommonLib logo BKCommonLib will not be updated to 1.8 for some time, we are experiancing issues geting spinot working, it is necesarry for the development of BKCommonLib, if you are able to provide spigot without package versioning please contact lenis0012 in a PM

Latest version: 1.57

CraftBukkit/SportBukkit/Spigot/MCPC+ build: CB 1.6.4 R1.0 / CB 1.6.4 R2.1 / Spigot 1.7

Older builds available: CB 1.5.2-R1.0 / CB 1.6.2-R1.0

Tekkit: Untested and thus unsupported, some features may not work as expected


This utility library shares all the common code needs for various plugins, and having them in one library heavily reduces the amount of duplicated code. The featured utilities are varied, and whenever something is missing in Bukkit, it is added in BKCommonLib. This is one of the reasons why it has become this large: there are simply a lot of things Bukkit doesn't (want to) offer.

BKCommonLib has versioning on a per-plugin basis, so when a certain plugin needs version 2, and version 1 is installed, the server owner is automatically notified and the plugin is not enabled. This prevents the common mishaps with outdated BKCommonLib versions.

Other than utilities and services, this library offers a wide variety of reflection and user-friendly ways of accessing net.minecraft.server. If your plugin requires the use of the internals, but do not want to risk changing field and method names, you can depend on BKCommonLib to provide them for you. This allows you to remain compatible between CraftBukkit versions automatically, and reduces silent failure hazards.

Reasons for you to depend on this library

  • You need to access Minecraft internals in your plugin, and Bukkit has no API for it
  • You are tired of re-uploading the same version over again because of the internals changing
  • You want to work with Vector/math logic, or need to use other utility classes
  • The YAML of Bukkit dislikes you, and you want this to be easier
  • You want to easily read and write configuration/data files
  • You want easy access to data conversion utilities to convert user input
  • You want to work with inventories in an advanced fashion
  • You want to work with unique server events
  • You want to alter entity behaviour (such as handling block collisions, custom movement, etc.)
  • You want plugin messages/permissions to be configurable
  • You want to work with (async)tasks without storing IDs
  • You want to send and manipulate packets


Getting started

To start using BKCommonLib, you have two options (after adding BKCommonLib as dependency in the plugin.yml):

Include the jar file as a dependency

Like any dependency, keep the jar file somewhere on your computer and add it to your classpath. Nothing special here.

Make a (new) maven project and include it

Add the following repository:

    <id>dj-tcraft repository</id>

And the following dependency (may need to update version):


Dependencies BKCommonLib uses

BKCommonLib supports various other plugins and projects. Below all of these are listed:

  • Vault - for permission plugin support
  • ProtocolLib - to avoid packet listening conflicts
  • Showcase(Standalone) - to ignore showcased items
  • HyperConomy - to ignore shop items
  • BleedingMobs - to ignore particles
  • CGLib - for generating nms.Entity classes on-the-fly to supply Entity Controllers
  • Objenesis - for generating classes without calling constructors (needed for various fixes inside class constructors)

Plugins that require BKCommonLib to be installed:


This plugin utilises Hidendra's plugin metrics system, which means that the following information is collected and sent to mcstats.org:

  • A unique identifier
  • The server's version of Java
  • Whether the server is in offline or online mode
  • The plugin's version
  • The server's version
  • The OS version/name and architecture
  • The core count for the CPU
  • The number of players online
  • The Metrics version Opting out of this service can be done by editing plugins/Plugin Metrics/config.yml and changing opt-out to true.


This library uses an open license. Feel free to use whatever code you need from it, you do not have to ask me either. If you want me to add certain features, that is fine too. Everyone is allowed to use this Library as a dependency. I do recommend extending 'PluginBase' instead of 'JavaPlugin' then, as it allows you to automatically deal with the BKCommonLib versioning checks. See also: BKCommonLib license file

This product includes software developed by the Apache Software Foundation (http://www.apache.org/)


BKCommonLib supports ProtocolLib when it is enabled, but if it is not, the player connection is replaced resulting in several incompatibilities. To fix these incompatibility issues, install ProtocolLib next to BKCommonLib. This can not be stressed enough. When incompatibility occurs, BKCommonLib will notify you in the console and will disable itself. The following plugins are known to be incompatible when ProtocolLib is NOT installed:


This plugin sends server count and dependency statistics to MCStats.org. You can (globally) opt out in the PluginMetrics/config.yml file.


I use a banner in my depending plugins. This banner is automatically updated when a new version of BKCommonLib is out. It is a quick and efficient way to keep track of updates for this library. This was needed, too, because a lot of people were using outdated BKCommonLib versions, which resulted in bug reports...too many of them. And I do not want to waste your time with invalid reports. You have a plugin that uses BKCommonLib? Feel free to use the banner on your download page.

[[http://dev.bukkit.org/bukkit-plugins/bkcommonlib/|{{http://ci.dj-tcraft.nl/job/BKCommonLib/lastSuccessfulBuild/artifact/target/BKCommonLibVersion.png|Go to the BKCommonLib Dev-bukkit page}}]]

Development Builds

DevBukkit Disclaimer
Click here to Download development builds of this Plugin

Go to the BKCommonLib Dev-bukkit page

Click here to add this banner to your page
How to place useful comments How to install plugins Solving errors and when to report them Reading and writing YAML

You must login to post a comment. Don't have an account? Register to get one!

  • Avatar of Bars96 Bars96 Jun 05, 2016 at 20:36 UTC - 0 likes

    I started porting it on Thermos/Cauldron, for now everything is going well! But it about 74 classes remaining porting... I hate this, even it 100% will work :)

  • Avatar of boom_boom_power boom_boom_power May 22, 2016 at 02:57 UTC - 0 likes

    ZBDH14a0a78603bab7f4bfff54029feff8d6 ZBDH430d0f13a0ab1587e01a0c0242b462b3 My Plugins: SimpleChatAlert

  • Avatar of aarongray0503 aarongray0503 Feb 20, 2016 at 21:33 UTC - 0 likes

    Can someone help me find the right version? when i download it pops up red :/ please help!

  • Avatar of ToxicMiniBro ToxicMiniBro Dec 24, 2015 at 00:23 UTC - 0 likes

    Where can I get the newest version. This one is called outdated in my console.

  • Avatar of woeterman94 woeterman94 Aug 21, 2015 at 22:10 UTC - 0 likes

    Can anyone please post a working link to the spigot build for bkcommonlib?

    I can't get the buildtools working! Where can I download spigot or craftbukkit that supports bkcommonlib? (for 1.8)


  • Avatar of giezenberg giezenberg Jul 22, 2015 at 11:26 UTC - 0 likes

    @bubba1234119: Go

    That would still be very cool to have, because bkcommonlib is a pain in the ass to update every version. But it is updated for 1.8 and that is what matters now, only what the future will bring is just a mystery and hopefully not that many nms changes.

  • Avatar of bubba1234119 bubba1234119 Jul 21, 2015 at 22:08 UTC - 0 likes

    Sorry guys I kinda dropped off of bukkit completely, I was thinking about backporting the server so the plugin would have full 1.8 compatibility with running on the protocol hack however that proved to be trivial. The plugin does already seem to be updated however bkcommonlib has one problem if there is another big packet update and that is heavily relies on nms. So with what I said in mind I may be looking into making a traincarts version that doesn't use nms where possible and uses reflection to try and guarantee that the protocol version doesn't have to be changed every time.


  • Avatar of Friwi Friwi Jul 14, 2015 at 17:09 UTC - 0 likes
  • Avatar of TheBlueKing TheBlueKing Jul 10, 2015 at 12:04 UTC - 0 likes

    is 1.8

  • Avatar of rautamiekka rautamiekka Jul 01, 2015 at 07:04 UTC - 0 likes

    <<reply 2597882>>

    No point in .6 when .7 is out.


Date created
Sep 18, 2012
Last update
Oct 27, 2014
Development stage
  • enUS
GNU General Public License version 3 (GPLv3)
Curse link
Reverse relationships
Recent files
  • R: v1.59 (1.7.10) for CB 1.7.9-R0.2 Oct 27, 2014
  • R: v1.58 for CB 1.7.9-R0.1 May 21, 2014
  • R: v1.57 for CB 1.7.2-R0.2 Jan 26, 2014
  • R: v1.56 for CB 1.6.4-R2.0 Nov 17, 2013
  • R: v1.55 for 1.6.4 Sep 30, 2013