I have tried and tried, but I can't seem to get an external library linked.

 

Has anyone done this?  Can they help!!

What do you mean with external lib?

 

i know what external is and what lib is but the combination of it is for me new.

I have a library developed by a third party (external) that I want to use.

 

This one to be exact - http://xstream.codehaus.org/download.html

I download it, drop it in the libs folder and add it to my class path.

I also found some information stating i should add it to the mods dir to have it get added to the class path.

 

When I actually try to use it I get a Java null pointer exception, as outlined below.

 

 

 

2013-02-25 21:06:08 [iNFO] [ForgeModLoader] FML has found a non-mod file xstream-1.4.4.jar in your mods directory. It will now be injected into your classpath. This could severe stability issues, it should be removed if possible.

2013-02-25 21:06:09 [iNFO] [ForgeModLoader] Configured a dormant chunk cache size of 0

2013-02-25 21:06:09 [sEVERE] [ForgeModLoader] Fatal errors were detected during the transition from PREINITIALIZATION to INITIALIZATION. Loading cannot continue

2013-02-25 21:06:09 [sEVERE] [ForgeModLoader]

mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized

FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized

Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized

bobber [bobber Mod] (bin) Unloaded->Constructed->Errored

2013-02-25 21:06:09 [sEVERE] [ForgeModLoader] The following problems were captured during this phase

2013-02-25 21:06:09 [sEVERE] [ForgeModLoader] Caught exception from bobber

java.lang.Error: Unresolved compilation problems:

The import com.thoughtworks cannot be resolved

XStream cannot be resolved to a type

XStream cannot be resolved to a type

 

at bob.bobsmod.manifest.Manifest.<init>(Manifest.java:

at bob.bobsmod.CommonProxy.ConfigInit(CommonProxy.java:13)

at bob.bobsmod.preInit(bobsmod.java:49)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)

at com.google.common.eventbus.EventBus.post(EventBus.java:268)

at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:153)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)

at com.google.common.eventbus.EventBus.post(EventBus.java:268)

at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:86)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:505)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:161)

at net.minecraft.client.Minecraft.startGame(Minecraft.java:410)

at net.minecraft.client.MinecraftAppletImpl.startGame(MinecraftAppletImpl.java:44)

at net.minecraft.client.Minecraft.run(Minecraft.java:744)

at java.lang.Thread.run(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] cpw.mods.fml.common.LoaderException: java.lang.Error: Unresolved compilation problems:

The import com.thoughtworks cannot be resolved

XStream cannot be resolved to a type

XStream cannot be resolved to a type

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.transition(LoadController.java:130)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.Loader.loadMods(Loader.java:506)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:161)

2013-02-25 21:06:19 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.startGame(Minecraft.java:410)

2013-02-25 21:06:19 [iNFO] [sTDERR] at net.minecraft.client.MinecraftAppletImpl.startGame(MinecraftAppletImpl.java:44)

2013-02-25 21:06:19 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:744)

2013-02-25 21:06:19 [iNFO] [sTDERR] at java.lang.Thread.run(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] Caused by: java.lang.Error: Unresolved compilation problems:

The import com.thoughtworks cannot be resolved

XStream cannot be resolved to a type

XStream cannot be resolved to a type

2013-02-25 21:06:19 [iNFO] [sTDERR] at bob.bobsmod.manifest.Manifest.<init>(Manifest.java:

2013-02-25 21:06:19 [iNFO] [sTDERR] at bob.bobsmod.CommonProxy.ConfigInit(CommonProxy.java:13)

2013-02-25 21:06:19 [iNFO] [sTDERR] at bob.bobsmod.bobber.preInit(bobber.java:49)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:153)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)

2013-02-25 21:06:19 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:86)

2013-02-25 21:06:19 [iNFO] [sTDERR] at cpw.mods.fml.common.Loader.loadMods(Loader.java:505)