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 This prevents the common mishaps with outdated BKCommonLib versions.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

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  • Avatar of carmeops carmeops Mar 31, 2015 at 20:56 UTC - 1 like

    @PsychoLynx: Go

    while we wait for traincart, we are currently using Easycarts on my server; to get around our traincarts designed railway XD, it's not perfect, but it allow people to get around

    Last edited Mar 31, 2015 by carmeops
  • Avatar of PsychoLynx PsychoLynx Mar 31, 2015 at 15:11 UTC - 0 likes

    Agh! Starting to get really antsy about the wait here, I'm afraid we'll have to update soon even if that means our subway's going to break down. Hope we won't have to resort to that.

  • Avatar of carmeops carmeops Mar 29, 2015 at 23:34 UTC - 0 likes

    where did bubba go? :( he was in such a good speed into it

  • Avatar of KamikazePlatypus KamikazePlatypus Mar 29, 2015 at 19:59 UTC - 0 likes

    Man, four months :(

  • Avatar of KamikazePlatypus KamikazePlatypus Mar 25, 2015 at 22:47 UTC - 0 likes

    @giezenberg: Go

    Ah I see. Still needs some more changes before it can compile though.

  • Avatar of giezenberg giezenberg Mar 25, 2015 at 22:43 UTC - 0 likes

    @KamikazePlatypus: Go

    The changes are in an other branch, don't know the name anymore...

  • Avatar of KamikazePlatypus KamikazePlatypus Mar 25, 2015 at 12:38 UTC - 0 likes

    @carmeops: Go

    There's no changes in Kpaulisse's fork as of yet.

  • Avatar of carmeops carmeops Mar 25, 2015 at 11:27 UTC - 0 likes

    @JK82NL: Go

    bubba1234119, KamikazePlatypus, giezenberg and others where working on it the past weeks, look the comments down here, bubba is busy atm but he was close to have a working version for 1.8

    check here: https://github.com/bergerkiller/BKCommonLib/network and here: https://github.com/bergerhealer/BKCommonLib/network

    Bergerkiller won't work on it until Sponge is out, but i still have my hope with the other guys :3

    edit: i see Kpaulisse has done some work on it yesterday, yay!

    Last edited Mar 25, 2015 by carmeops
  • Avatar of JK82NL JK82NL Mar 25, 2015 at 03:08 UTC - 0 likes

    Bergerkillers last login was Nov 01, 2014.

    High probability this is dead, unless someone else picks it up.

    Even the development page that is stated here doesn't exist anymore.

    Last edited Mar 25, 2015 by JK82NL
  • Avatar of carmeops carmeops Mar 25, 2015 at 01:24 UTC - 0 likes

    @KamikazePlatypus: Go

    but, Bubba, two weeks ago, said he could probably push a working build soon XD

    let me believe man, i need to believe, i already made all the new railroad for our server on our 1.8 map, i want to believe XD


Date created
Sep 18, 2012
Last update
Oct 27, 2014
Development stage
  • enUS
GNU General Public License version 3 (GPLv3)
Curse link
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