[Help] No classdeffound

Discussion in 'Plugin Development' started by Shalar, Jan 20, 2012.

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    I am trying to make a plugin, that uses joda-time to calculate elapsed time. I have added it to my project as an external library, and when using the plugin i get an error saying that noclassdeffound. I have figured out that thiis means the library is not in my classpath. my question is this: How do I add this to my classpath, and do so in such a way that it can download the library if it does not exist, as well as not causing a conflict with other plugins?

    I have shaded it with maven and used maven to put it in the classpath but when i do so other plugins that don't (for all I can tell) even use joda complain that it cannot find the classpath for some part of joda.

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: May 23, 2016
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    You should post the full error you're getting. My guess is your plugin.yml file is wrong.
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    zsombi28 likes this.
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    The problem after I do that is some other class tries looking for joda if it is found in the classpath. I have encountered this with ChestShop. The error thrown by ChestShop is below.

    2012-01-21 05:26:46 [SEVERE] Error occurred while enabling ChestShop v3.33 (Is it up to date?): org/joda/time/LocalDateTime
    java.lang.NoClassDefFoundError: org/joda/time/LocalDateTime
        at com.avaje.ebeaninternal.server.type.DefaultTypeManager.initialiseJodaTypes(DefaultTypeManager.java:633)
        at com.avaje.ebeaninternal.server.type.DefaultTypeManager.<init>(DefaultTypeManager.java:165)
        at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:137)
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:209)
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:64)
        at com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:78)
        at com.lennardf1989.bukkitex.Database.loadDatabase(Database.java:156)
        at com.lennardf1989.bukkitex.Database.initializeDatabase(Database.java:74)
        at com.Acrobot.ChestShop.ChestShop.setupDB(ChestShop.java:122)
        at com.Acrobot.ChestShop.ChestShop.onEnable(ChestShop.java:58)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:188)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:968)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:186)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:169)
        at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:348)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:335)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:165)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:399)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
    Caused by: java.lang.ClassNotFoundException: org.joda.time.LocalDateTime
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
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    Try putting the jar file of the library in your plugins folder. I know eclipse sets it up so I can do that maybe maven does to.
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    I tryed, but no effect.
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    Then I wouldn't know, sorry
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    Solved, when put to project lib, server lib, and copyed all files to plugin. Thanks for help
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