BKCommonLib logo

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 This prevents the common mishaps with outdated BKCommonLib versions.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 sanjay900 sanjay900 Oct 24, 2014 at 10:09 UTC - 0 likes

    For those who need a 1.8 build, try this. If its removed by bukkit staff, pm me. https://eyrenetwork.net/BKCommonLib-1.59-SNAPSHOT.jar

    Tested to work with PortalStick and MyWorlds. I think traincarts is working, but someone might want to confirm that. If you find any problems, give me a pm.

    This is an unoffical build. I built it because i wanted to get some work done on the next PortalStick update, and we needed BKCommonLib to do so.

    One thing i should probably mention. Since TabLists changed, i removed the code that handled them, because i didn't feel like fixing that.

    Last edited Oct 24, 2014 by sanjay900
  • Avatar of tmad40blue tmad40blue Oct 21, 2014 at 21:12 UTC - 0 likes

    @Chelrid: Go

    There is no 1.7.10 version yet. lenis0012 did not upload it on the 18th like he said he would, so we're all still waiting.

    Last edited Oct 21, 2014 by tmad40blue


    Intercraften • The #1 Family-Friendly Minecraft Server • Owner

  • Avatar of Chelrid Chelrid Oct 21, 2014 at 20:27 UTC - 0 likes

    how or where i can download the version for 1.7.10?

  • Avatar of PsychoLynx PsychoLynx Oct 18, 2014 at 18:42 UTC - 0 likes

    @lenis0012: Go

    Thank you! I've been dying to find a build for 1.7.10, it's the final thing I need to have my dream setup running correctly!

    Last edited Oct 19, 2014 by PsychoLynx
  • Avatar of lenis0012 lenis0012 Oct 18, 2014 at 07:57 UTC - 1 like

    To clarify some things.
    1.8 builds do NOT exist
    1.7.10 builds were hosted on our build server which i was unable to afford any longer
    a build for 1.7.9 is still hosted on BukkitDev.

    I will upload a build for 1.7.10 today

    Wait, i did not quit bukkit?

  • Avatar of PhatMale PhatMale Oct 16, 2014 at 12:25 UTC - 0 likes

    @grazazel: Go

    it appears that the sub-domain name for the development builds is currently down. I don't know if he deleted all the contents and not planning to update it, as all images linking back to that directory are also not loading above for instance the depending banner..

                      My Minecraft server, online 24/7    MC.PhatMale.com
  • Avatar of grazazel grazazel Oct 15, 2014 at 19:54 UTC - 0 likes

    Hi is the site for developmental builds down as tried to get the version for 1.7.10 but says site not responding

  • Avatar of FraazT0 FraazT0 Oct 10, 2014 at 12:33 UTC - 0 likes

    It doesn't work: I installed it ans I restarted the server but when I do /pl it says which it's deactivated. Why?

    FraazT0 Server

  • Avatar of ShooterMC ShooterMC Oct 09, 2014 at 18:55 UTC - 0 likes

    @sanjay900: Go

    I don't understant that. Do you have the plugin updated? Can you share it?


  • Avatar of sanjay900 sanjay900 Oct 02, 2014 at 10:32 UTC - 0 likes

    @TMCThomas: Go

    I pushed a PR to the GitHub. I updated it to the protocol hack for PortalStick, give it a try if you want.


Date created
Sep 18, 2012
Last update
May 21, 2014
Development stage
  • enUS
GNU General Public License version 3 (GPLv3)
Curse link
Recent files
  • 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
  • R: v1.54 for CB 1.6.2-R0.1 Aug 18, 2013