我在使用 kotlin 撰寫 minecraft 插件時遇到了問題。這是錯誤訊息：
[12:37:07 ERROR]: Error occurred while enabling WorkAndGambling v1.0-SNAPSHOT (Is it up to date?)
java.lang.ExceptionInInitializerError: null
at io.github.buudd.wag.Main.onEnable(Main.kt:10) ~[WorkAndGambling.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:370) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:500) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.enablePlugin(CraftServer.java:561) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.enablePlugins(CraftServer.java:475) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.loadWorld(MinecraftServer.java:730) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:317) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1217) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[patched_1.17.1.jar:git-Paper-352]
at java.lang.Thread.run(Thread.java:831) ~[?:?]
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:229) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:53) ~[patched_1.17.1.jar:git-Paper-352]
at io.github.buudd.wag.Main.<init>(Main.kt:7) ~[WorkAndGambling.jar:?]
at io.github.buudd.wag.FunctionsKt.<clinit>(functions.kt:12) ~[WorkAndGambling.jar:?]
... 11 more
Caused by: java.lang.IllegalStateException: Initial initialization
at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:232) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:53) ~[patched_1.17.1.jar:git-Paper-352]
at io.github.buudd.wag.Main.<init>(Main.kt:7) ~[WorkAndGambling.jar:?]
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:78) ~[?:?]
at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?]
at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[?:?]
at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:350) ~[?:?]
at java.lang.Class.newInstance(Class.java:642) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:83) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:153) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:414) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:322) ~[patched_1.17.1.jar:git-Paper-352]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.loadPlugins(CraftServer.java:419) ~[patched_1.17.1.jar:git-Paper-352]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:287) ~[patched_1.17.1.jar:git-Paper-352]
... 3 more
我注意到錯誤發生在 Main.kt 的第 10 行。那是 loadConfig() 函式。所以，我查看了 Functions.kt：
package io.github.buudd.wag
import org.bukkit.configuration.file.YamlConfiguration
import io.github.buudd.wag.Variables.cfile
import io.github.buudd.wag.Variables.file
fun loadConfig() {
cfile = YamlConfiguration.loadConfiguration(file)
try {
if (!file.exists()) {
cfile!!.save(file)
}
cfile!!.load(file)
} catch (localException: Exception) {
localException.printStackTrace()
}
}
和變數。變數.kt：
import org.bukkit.configuration.file.YamlConfiguration
import org.bukkit.plugin.java.JavaPlugin
import java.io.*
import java.util.*
object Variables {
private val plugin: JavaPlugin = Main()
var moneyMap: MutableMap<UUID?, Int?> = mutableMapOf(null to null)
var joinMap: MutableMap<UUID?, Int?> = mutableMapOf(null to null)
val file: File = File("plugins/WorkAndGambling/config.yml")
var cfile: YamlConfiguration? = null
}
主檔案
package io.github.buudd.wag
import io.github.buudd.wag.commands.WAGcommand
import io.github.buudd.wag.listener.Listeners
import org.bukkit.plugin.java.JavaPlugin
class Main : JavaPlugin() {
override fun onEnable() {
logger.info("Enabling...")
loadConfig()
getCommand("sell")?.apply {
setExecutor(WAGcommand(this@Main))
tabCompleter = WAGcommand(this@Main)
}
server.pluginManager.registerEvents(Listeners(), this)
}
override fun onDisable() {
logger.info("Disabling...")
}
}
但是，我找不到錯誤發生的原因。抱歉，如果此代碼的問題只是我的錯誤。
uj5u.com熱心網友回復：
該插件已啟用。
這可能是因為：
- 相同的插件已經在服務器上，但有另一個 JAR 名稱
要修復它，只需取出舊罐子。
- 另一個插件使用相同的名稱
要修復它，請進入plugin.yml并更改name變數。
- 您創建此插件的一個新實體，并
JavaPlugin創建一個新的介面。這是在Variables課堂上引起的。如何解決？
您應該將實體設定為靜態，然后在方法引數/建構式中傳輸它。
“實體為靜態”的示例：
companion object {
lateinit var plugin: Main
}
override fun onEnable() {
plugin = this;
}
靜態方式的來源
“在引數/建構式中傳輸”的示例：
這取決于您如何使用此變數。你似乎已經為班級做到了WAGcommand。
PS：我是 Java spigot 開發人員，所以可能 kotlin 代碼存在問題。
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