Title explains it all. Here's my code Code (Text): package clock.clock; import java.util.ArrayList; import org.bukkit.Bukkit; import org.bukkit.GameMode; import org.bukkit.Material; import org.bukkit.entity.Player; import org.bukkit.event.EventHandler; import org.bukkit.event.Listener; import org.bukkit.event.block.Action; import org.bukkit.event.player.PlayerInteractEvent; import org.bukkit.event.player.PlayerMoveEvent; import org.bukkit.inventory.ItemStack; import clock.clock.EventHandle; public class Clock implements Listener { ArrayList<Player> freeze = new ArrayList<Player>(); private EventHandle plugin; public Clock(EventHandle plugin) { plugin.getServer().getPluginManager().registerEvents(this, plugin); } @EventHandler public void onPlayerMove(PlayerMoveEvent e) { Player p = e.getPlayer(); if ((this.freeze.contains(p)) && ( (e.getFrom().getX() != e.getTo().getX()) || (e.getFrom().getZ() != e.getTo().getZ()))) { e.setTo(e.getFrom()); return; } } @EventHandler public void clockClick(PlayerInteractEvent e) { Player player = e.getPlayer(); if (((e.getAction() == Action.LEFT_CLICK_AIR) || (e.getAction() == Action.LEFT_CLICK_BLOCK)) && (player.getItemInHand().getType() == Material.WATCH) && player.getGameMode() == GameMode.SURVIVAL) { int amount = player.getPlayer().getItemInHand().getAmount(); player.getItemInHand().setAmount(amount - 1); if (player.getItemInHand().getAmount() == 1) { e.getPlayer().getInventory().setItemInHand(new ItemStack(Material.AIR, 1)); } double blockDistance = 30; for (Player other : Bukkit.getOnlinePlayers()) { if (other.getLocation().distance(player.getLocation()) <= blockDistance && other != player) { freeze.add(other); Bukkit.getServer().getScheduler().runTaskLater(plugin, new Runnable() { public void run() { freeze.remove(other); } }, 200); } } } } } Here is my log HTML: [18:45:13 ERROR]: Could not pass event PlayerInteractEvent to TestClock v1.0 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:228) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:191) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1200) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:18) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:1) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_77] at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_77] at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.lang.Thread.run(Unknown Source) [?:1.8.0_77] Caused by: java.lang.IllegalArgumentException: Plugin cannot be null at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.validate(CraftScheduler.java:397) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:123) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskLater(CraftScheduler.java:106) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at clock.clock.Clock.clockClick(Clock.java:62) ~[?:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] ... 18 more [18:45:13 ERROR]: Could not pass event PlayerInteractEvent to TestClock v1.0 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:228) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:191) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1200) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:18) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:1) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_77] at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_77] at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.lang.Thread.run(Unknown Source) [?:1.8.0_77] Caused by: java.lang.IllegalArgumentException: Plugin cannot be null at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.validate(CraftScheduler.java:397) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:123) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskLater(CraftScheduler.java:106) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at clock.clock.Clock.clockClick(Clock.java:62) ~[?:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] ... 18 more [18:45:13 ERROR]: Could not pass event PlayerInteractEvent to TestClock v1.0 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:228) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:191) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1200) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:18) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:1) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_77] at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_77] at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot_server.jar:git-Spigot-db6de12-18fbb24] at java.lang.Thread.run(Unknown Source) [?:1.8.0_77] Caused by: java.lang.IllegalArgumentException: Plugin cannot be null at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.validate(CraftScheduler.java:397) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:123) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.runTaskLater(CraftScheduler.java:106) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] at clock.clock.Clock.clockClick(Clock.java:62) ~[?:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-db6de12-18fbb24] ... 18 more
You never initialized your plugin variable. So I'm guessing when you try to create this scheduler with the "plugin" variable, it won't work since plugin is null.
In your main class, the one that extends java plugin, you can initialize your plugin by doing something like... plugin = this; Or you could make a method to return the instance of your main class.
I already have this Code (Text): private EventHandle plugin; public Clock(EventHandle plugin) { plugin.getServer().getPluginManager().registerEvents(this, plugin); }
