Solved NoSuchMethodError

So I'm getting this random error all of a sudden. (It might be because I updated my server to 1.7.5 but idk.

Code:

[12:13:17 ERROR]: Could not load 'plugins\MainKitsPlugin.jar' in folder 'plugins
'
org.bukkit.plugin.InvalidPluginException: java.lang.NoSuchMethodError: Mains.Lan
gYAML.<init>(LMains/MainKits;)V
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:131) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:328) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:251) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at org.bukkit.craftbukkit.v1_7_R2.CraftServer.loadPlugins(CraftServer.ja
va:351) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at org.bukkit.craftbukkit.v1_7_R2.CraftServer.<init>(CraftServer.java:31
3) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at net.minecraft.server.v1_7_R2.PlayerList.<init>(PlayerList.java:63) [c
raftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at net.minecraft.server.v1_7_R2.DedicatedPlayerList.<init>(SourceFile:14
) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at net.minecraft.server.v1_7_R2.DedicatedServer.init(DedicatedServer.jav
a:126) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java
:426) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:6
18) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
Caused by: java.lang.NoSuchMethodError: Mains.LangYAML.<init>(LMains/MainKits;)V
 
        at Mains.MainKits.<init>(MainKits.java:224) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
~[?:1.7.0_45]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
~[?:1.7.0_45]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce) ~[?:1.7.0_45]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.7.0_4
5]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.7.0_45]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:52) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:127) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-8-ga662658-b3032jnks]
        ... 9 more

Line 224:
LangYAML langYAML = new LangYAML(this);
LangYAML Class:

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Code:java

public class LangYAML {
    private MainKits plugin;
 
    public LangYAML(MainKits plugin) {
        this.plugin = plugin;
    }
    private FileConfiguration lang = null;
    private File langFile = null;
    public FileConfiguration getLang() {
        if (lang == null) {
            reloadLang();
        }
        return lang;
    }
    public void saveDefaultLang() {
        if (langFile == null) {
            langFile = new File(plugin.getDataFolder(), "lang.yml");
        }
        if (!langFile.exists()) {
            plugin.saveResource("lang.yml", false);
        }
    }
    public void reloadLang() {
        if (langFile == null) {
            langFile = new File(plugin.getDataFolder(), "lang.yml");
        }
        lang = YamlConfiguration.loadConfiguration(langFile);
 
        InputStream defConfigStream = plugin.getResource("lang.yml");
        if (defConfigStream != null) {
            YamlConfiguration defConfig = YamlConfiguration.loadConfiguration(defConfigStream);
            lang.setDefaults(defConfig);
        }
    }
    public void saveLang() {
        if (lang == null || langFile == null) {
            return;
        }
        try {
            this.getLang().save(langFile);
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

I made a new class name LangsYAML and it just worked... So random.

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

 

Can you please set the title to solved? So everyone who has the same issue could fix..

 

The issue was that you had referenced the class somewhere, but the class had been removed. You could just remove the class you made and remove any references to it. I need to make a video on reading stack traces.

 

PogoStick29 I never removed the class. I moved around some packages and stuff and that's probably what did it.

 

Sounds like either you moved instead of refactoring (maybe you weren't using an IDE?) or you forgot to update your imports.