Solved No Such Method Exception (not as easy as you think)

Ok, for some reason, when I export my plugin in Eclipse and then run my local test server, I get this:

Code:

18:54:01 [SEVERE] Could not load 'plugins\SimpleSuffix.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoSuchMethodError: me.Staart
vin.Commands.Commands.<init>(Lme/Staartvin/SimpleSuffix/SimpleSuffix;)V
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:182)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:305)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:230)
        at org.bukkit.craftbukkit.v1_4_R1.CraftServer.loadPlugins(CraftServer.ja
va:239)
        at org.bukkit.craftbukkit.v1_4_R1.CraftServer.reload(CraftServer.java:59
4)
        at org.bukkit.Bukkit.reload(Bukkit.java:184)
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:
23)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
6)
        at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServe
r.java:514)
        at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchServerCommand(Craf
tServer.java:506)
        at net.minecraft.server.v1_4_R1.DedicatedServer.al(DedicatedServer.java:
260)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:2
25)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:4
94)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java
:427)
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:8
49)
Caused by: java.lang.NoSuchMethodError: me.Staartvin.Commands.Commands.<init>(Lm
e/Staartvin/SimpleSuffix/SimpleSuffix;)V
        at me.Staartvin.SimpleSuffix.SimpleSuffix.<init>(SimpleSuffix.java:27)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:178)
        ... 14 more

I understand that Java can not find a certain class? The '<init>' shows me that it's something to do with a constructor of a certain class. I tried removing the 'Commands' class and copy all a new class with exact the same name, but it still gave me this error.

I think there is a easy solution for this, but for some reason I can't seem to fix it myself.
Sorry for bugging you, but yeah... It's driving me insane


Main Class: http://pastebin.com/sBYawzjP
Commands Class: http://pastebin.com/7BTLafiH


OS: Windows 8 pro
Java version (cmd 'java -version'): java version "1.6.0_37" Java(TM) SE Runtime Environment (build 1.6.0_37-b06) Java HotSpot(TM) Client VM (build 20.12-b01, mixed mode, sharing)
CraftBukkit version: 1.4.7-R0.2 (Build #02612)

 

can you give the sources?

 

whats at SimpleSuffix.java line 27
and show us the Commands class.

 

This is the commands.class: http://pastebin.com/7BTLafiH

 

instead of passing the instance into the construuctor as arguments,
in the main class make a public static JavaPlugin instance;
variable and in onEnable set it to this.

 

S

On line 27, I'm just declaring the Commands class.
'public Commands commands = new Commands(this);'

 

sometimes, weird errors like this are caused by a bug inside the ide, try restarting your ide and rebuilding your project

 

I've already done that.

I don't think this is the solution because all my other classes work just fine.
They have exactly the same setup.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

ik its still as easy because all you have to do is static import them to use them w/o typing MainClass.instance.

 

tommycake50
I've learnt that using a static variable to access the main class is not really the way to go, though? I don't really want to change it as my other classes get initialised the same as the Commands one but don't act this weird. Isn't there just a simple solution?

 

Who taught you that?
It is ok to use a static reference to your MainClass because you normally won't call it a second time.

So other question: Did you changed the bukkit.jar? ( maybe to a newer? ) or do you have cached versions of your Commands class without this constructor? It seems like this. Maybe you should force a rebuild of all resources it should handle this problem.

 

camyono
I've deleted my .jar completely and exported it again as a fresh new jar. I downloaded the latest craftbukkit version. #2612. It's still giving me the same error.

 

can you try my idea and post again?
just want to see if it works(always worth a shot)...

 

Ok, I'll try it.

Nope, still the same error.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

If this wont work, post some more code... just to follow how u init everything

 

ok.
do what camyono said.

 

Ok, here you go: Simple Suffix.class: http://pastebin.com/sBYawzjP

 

it needs to init in the onEnable block ...

If the class is accessed it will try to init it. But at this time you have no instance of your plugin i think

BTW: please use CamelCase and write package name in lower.case
Use getter and setter for your fields and make them private or protected and only public if it needs to be like this!

 

Why do the other classes work then?

 

Static should be avoided if possible (and yes, here it is possible to avoid it)

Staartvin post SimpleSuffix.java please :3

 

you have a point there fire.

 

Thanks for the side note, but I need to get this fixed

 

Did you tried it the way i said to you?

 

Do you mean the 'rebuild all resources'?

 

No... to init all your classes in onEnable and not in the class head

 

no he ment move all the initializations that use the 'this' as parameter in the onEnable()

 

camyono fireblast709

Nope, it still gives the same error..

 

Delete the Commands.class from bin and try to rebuild your jar.

If this not help i am out here.

 

Its almost like... you did some weird stuff with external libraries or something. Check if the Commands.class is in the same jar as the main class

 

I think there is a cached version somewhere which dont have this constructor which is called :/