AddPotionEffect not working

Hey everyone,

for some reason the addPotionEffect doesn't work. (Using spigot 1.9)

Heres my code:
https://codeshare.io/16nSv

Error I'm getting:
... 26 more at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-1a196e1-6f032cd] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73] at me.dansmith.com.Main.lifeSteal(Main.java:46) ~[?:?]Caused by: java.lang.NullPointerException at java.lang.Thread.run(Unknown Source) [?:1.8.0_73] at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:721) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [spigot.jar:git-Spigot-1a196e1-6f032cd] at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_73] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_73] at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.PacketPlayInUseEntity.a(SourceFile:12) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.PacketPlayInUseEntity.a(SourceFile:68) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1529) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityPlayer.attack(EntityPlayer.java:1141) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityHuman.attack(EntityHuman.java:999) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityPlayer.damageEntity(EntityPlayer.java:513) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityHuman.damageEntity(EntityHuman.java:762) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityLiving.damageEntity(EntityLiving.java:814) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityHuman.damageEntity0(EntityHuman.java:838) [spigot.jar:git-Spigot-1a196e1-6f032cd] at net.minecraft.server.v1_9_R1.EntityLiving.damageEntity0(EntityLiving.java:1206) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.craftbukkit.v1_9_R1.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:588) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.craftbukkit.v1_9_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:465) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.craftbukkit.v1_9_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:556) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.craftbukkit.v1_9_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:87) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1a196e1-6f032cd] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-1a196e1-6f032cd]org.bukkit.event.EventExceptionCould not pass event EntityDamageByEntityEvent to CustomEnchants v1.0


If Someone could please help, it would be appreciated.

 

@Smitty
Please read this:
https://bukkit.org/threads/how-to-r...ubleshoot-your-own-plugins-by-yourself.32457/

Also, seeing your code would really help us tell you what is wrong.

 

@Zombie_Striker I put a link to my code right in the thread.

 

public void dizzy(EntityDamageByEntityEvent e) {
Player p = (Player) e.getEntity();


How do you know if the entity is actually a Player?
Don't blind cast, check if the entity is a player before casting

 

@Dynamus How?

 

If(Entity(From the event) instaceof Player)...

 

By learning Java. ¯\_(ツ)_/¯

Sorry to break it to you, but it's a bit obvious you don't know much about Java.
Please, please, please, learn Java before trying to code with the Bukkit API. Chances are you probably just looked up a tutorial on YouTube. This is one of the worst ways to do it because it could teach bad habits, or just give you misleading information. The main reason we keep telling this to users is not because we're a bunch of mini-mods getting after users because we feel like it, but because if you aren't knowledgable of at least the basics of Java, problems that would be easy to solve for a person that knew Java, would stump a user that had no Java knowledge. Here's a link that could help a bit: http://docs.oracle.com/javase/tutorial/

 

@CodePlaysMinecraft Please don't make assumptions like this, I do know java, just a beginner.

 

@Smitty I'm just assuming because there's an easy solution to your problem. Anyway, did you understand what was said in @Dynamus' post or is there a problem? If so, please post updated code.

 

@CodePlaysMinecraft
Please take into consideration, I know the basics of java code, and expanding my knowledge. And to answer your question, no. When i put if(Entity instanceof Player) { Entity is underlined in red

EDIT: Got the if statement figured out: if(e.getEntity() instanceof Player) {

but now, the addPotionEffect still doesn't work.

Updated code share in thread

 

@Smitty
Of course is underlined red, do you really did this way? if(Entity instaceof Player)?
That was a example. You need to specify what entity, in this case check if the entity that is receiving damage is a instance of a player. Sorry for my bad english. I'm always trying to learn.

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/entity/EntityDamageByEntityEvent.html

 

You shouldn't learn java while learning bukkit, and you need at least intermediate java to handle bukkit.

Because you don't know, how to check, if an object extends something, then sorry, but you don't even know the basics.