插口无法将事件BlockPlaceEvent传递给插件v1.0

Question

所以我一直在尝试编写一个简单的插件来删除一个块。放置后5秒或10滴答声。但我遇到了一些问题。当我放置一个块来测试它时，我得到了下面所述的错误，因为我在编程方面不是很有经验，我不知道如何修复它。我们将不胜感激。

我的错误是：

11:32:29 ERROR]: Could not pass event BlockPlaceEvent to firstPlugin v1.0
java.lang.ClassCastException: class me.chappiemwoan.firstPlugin.events.firstPluginEvents cannot be cast to class org.bukkit.plugin.Plugin (me.chappiemwoan.firstPlugin.events.firstPluginEvents is in unnamed module of loader org.bukkit.plugin.java.PluginClassLoader @1f0389ee; org.bukkit.plugin.Plugin is in unnamed module of loader 'app')
        at me.chappiemwoan.firstPlugin.events.firstPluginEvents.blockTimer(firstPluginEvents.java:40) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor1.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.4.jar:git-Paper-276]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.16.4.jar:git-Paper-276]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.4.jar:git-Paper-276]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.16.4.jar:git-Paper-276]
        at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callBlockPlaceEvent(CraftEventFactory.java:378) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.ItemStack.placeItem(ItemStack.java:280) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.PlayerInteractManager.a(PlayerInteractManager.java:533) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1535) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.PacketPlayInUseItem.a(PacketPlayInUseItem.java:27) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.PacketPlayInUseItem.a(PacketPlayInUseItem.java:5) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:23) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1136) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1129) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1090) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1004) ~[patched_1.16.4.jar:git-Paper-276]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.4.jar:git-Paper-276]
        at java.lang.Thread.run(Thread.java:832) [?:?]

下面是我的代码。

    package me.chappiemwoan.firstPlugin.events;

import me.chappiemwoan.firstPlugin.*;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import me.chappiemwoan.firstPlugin.Override;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.event.entity.EntityPickupItemEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerPickupItemEvent;
import org.bukkit.plugin.Plugin;

public class firstPluginEvents implements Listener {

    @EventHandler
    public static void onPlayerJoin(PlayerJoinEvent event) {
        Player player = event.getPlayer();
        player.sendMessage(ChatColor.RED + "WELCOME TO THE SERVER");

    }

    @EventHandler
    public static void onItemPickUp(PlayerPickupItemEvent event1) {
        Player player1 = event1.getPlayer();
        player1.kickPlayer("haha you thought");
    }

    @EventHandler
    public void blockTimer(BlockPlaceEvent event2) {
        Block block = event2.getBlock();
        Location location = block.getLocation();

        Bukkit.getScheduler().scheduleSyncDelayedTask((Plugin) this, new Runnable() {
            @Override
            public void run() {
                location.getBlock().setType(Material.AIR);
            }
        }, 10L);

    }

}

Answer 1

我不确定你现在是否已经解决了这个问题，但我也有同样的问题，在做了一些挖掘之后，我发现“插件”部分没有在你编写代码的类中定义。如果您在主类中使用该代码，它应该可以正常工作，但由于您试图在不同的类“FirstPlugineEvents”中运行它，它不知道“plugin”是什么意思。您必须将顶部代码放在主类“on_enable”中，将底部代码放在“FirstPlugineEvents”类中。这将告诉你的插件，“插件”是指你正在编写的实际插件。这个链接更详细地介绍了这一点。

把这个放在你的主类中：

new firstPluginEvents(this);

把这个放到你的“firstPluginEvetns”课上：

private MainClass plugin;

public firstPluginEvents(MainClass plugin){
    this.plugin = plugin;
}

Minecraft插件计划SyncDelayed任务错误

Answer 2

所以我现在发现计时器肯定是问题所在。没有定时器，它工作得很好。我几乎肯定知道问题出在这一部分，（（plugin）this，new Runnable（）但我不知道如何修复它。