在实例上调用方法，而不是在无法使用静态类型的类上调用 [英] Calling the method on an instance rather than the class not working with static type

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问题描述

我目前正在尝试创建一个插件，但是我遇到了一个错误，该错误不会让我调用方法，因为对于在方法中发生的事情，它必须是静态的.

I am currently trying t create a plugin and I have can across an error that wont let me call a method because it needs to be static for something that happens in the method.

我通过使用package.Main main = new package.Main();解决了这个问题.

I sort of fixed this problem by using: package.Main main = new package.Main();.

现在，我剩下的问题是，当我实际使用main.method();调用该方法时，它说上面的代码需要是静态的，但是当我这样做时，它随后在控制台中返回此错误.

Now, the problem I am left with is that when I actually call the method, using main.method(); it says that the code above needs to be static however when I do this, it then returns this error in console.

org.bukkit.command.CommandException: Unhandled exception executing command 'devmode' in plugin DevelopmentMode v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:621) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1079) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:939) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:37) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:9) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit.jar:git-Bukkit-e91aed8]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_71]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_71]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:676) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:632) [craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:540) [craftbukkit.jar:git-Bukkit-e91aed8]
        at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.ExceptionInInitializerError
        at package.commands.devModeClickCommands.Main(devModeClickCommands.java:22) ~[?:?]
        at package.commands.devMode.onCommand(devMode.java:60) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        ... 15 more
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at package.devmode.Main.<init>(Main.java:12) ~[?:?]
        at package.commands.activateDevMode.<clinit>(activateDevMode.java:20) ~[?:?]
        at package.commands.devModeClickCommands.Main(devModeClickCommands.java:22) ~[?:?]
        at package.commands.devMode.onCommand(devMode.java:60) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        ... 15 more
Caused by: java.lang.IllegalStateException: Initial initialization
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at package.devmode.Main.<init>(Main.java:12) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)~[?:1.7.0_71]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)~[?:1.7.0_71]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_71]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.7.0_71]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.7.0_71]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:288) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:719) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.Bukkit.reload(Bukkit.java:543) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:621) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:607) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:371) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:336) ~[craftbukkit.jar:git-Bukkit-e91aed8]
        ... 3 more

任何帮助都会很棒，谢谢！

Any help would be awesome, thanks!

编辑-代码示例

我要调用的方法在单独的包中的Main类中:

The method I'm trying to call is in my Main class in a separate package:

public void newCountdown() {
    System.out.print("I MADE IT!");
    this.getServer().getScheduler().scheduleSyncRepeatingTask(this, new Runnable() {
        public void run() {
            for (Player player : Bukkit.getServer().getOnlinePlayers()) {
                player.sendMessage("Hey");
            }
        }                   
}, 0, 20);
}

在这里，我试图从不同的类，在不同的包中调用上述方法.

Here, I am trying to call the method above from a different class, in a different package.

public class class {

    package.Main main = new package.Main();

    public static void activate(Player player) {
        main.newCountdown();
    }

推荐答案

基于此行Caused by: java.lang.IllegalArgumentException: Plugin already initialized!，该插件已在其他地方初始化，因此此调用将是多余的.在bukkit论坛中查看此线程以获得更详细的解释.

Based on this line Caused by: java.lang.IllegalArgumentException: Plugin already initialized! the plugin is already initialized somewhere else so this call would be redundant. Check out this thread in the bukkit forum for a more detailed explanation.

这篇关于在实例上调用方法，而不是在无法使用静态类型的类上调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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