Solved EventException on InteractEvent (ItemMeta issue)

I'm checking if the item has a certain ItemMeta (If so open Gui). The whole point of this is that when using a regular chest/item it won't open the GUI, which works perfectly fine. However when I click without a block in my inventory (hand) it throws a EventException. Error on line 183 (InfoManager) and 220 (Navigator).

Line 183 & 220:

Code:

ItemMeta im = is.getItemMeta();

Event: (Same events for both classes)

Code:

@EventHandler
   public void onPlayerInteract(PlayerInteractEvent event) {
       Action a = event.getAction();
               ItemStack is = event.getItem();
               ItemMeta im = is.getItemMeta();
           
    if (a == Action.PHYSICAL || is == null || is.getType() == Material.AIR)
        return;

    if(event.getPlayer().getWorld().getName().equals("Spawnworld")) {
    
        if (is.getType() == Material.COMPASS)
            if(im.hasDisplayName()) {
                if(ChatColor.stripColor(im.getDisplayName()).equals("Navigation")) {
                    openGUI(event.getPlayer());
                }
            }
       }
   }

}

Error:

Console Error (open) Console Error (close)

[00:25:06 ERROR]: Could not pass event PlayerInteractEvent to UltimateHub v1.7.4

org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:297) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:209) [craftbukkit_server.jar:git-Bukkit-1092acb
]
at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInt
eractManager.java:462) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:693) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:50) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:80) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [cra
ftbukkit_server.jar:git-Bukkit-1092acb]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_25]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_25]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
43) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:2
84) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:5
98) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:506) [craftbukkit_server.jar:git-Bukkit-1092acb]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
at me.anonymous350.hub.Navigator.onPlayerInteract(Navigator.java:220) ~[
?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_25]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:295) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
... 16 more
[00:25:06 ERROR]: Could not pass event PlayerInteractEvent to UltimateHub v1.7.4

org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:297) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit_server.jar:git-Bukkit-1092acb]
at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:209) [craftbukkit_server.jar:git-Bukkit-1092acb
]
at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInt
eractManager.java:462) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:693) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:50) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:80) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [cra
ftbukkit_server.jar:git-Bukkit-1092acb]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_25]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_25]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
43) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:2
84) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:5
98) [craftbukkit_server.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:506) [craftbukkit_server.jar:git-Bukkit-1092acb]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
at me.anonymous350.hub.InfoManager.onPlayerInteract(InfoManager.java:183
) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_25]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:295) ~[craftbukkit_server.jar:git-Bukkit-1092acb]
... 16 more

 

Caused by: java.lang.NullPointerException
Hmm...
ItemMeta im = is.getItemMeta();
You get the item meta of something being null first of all,
and secondly try debiging

 

Oooh, InteractEvent Your title says InternetEvent, I wondered what that was lol.

 

@mine-care

I already debugged it multiple times, otherwise I wouldn't have posted. It would be helpful you explained how to fix this. (Don't need to spoon-fed)

 

Check if your ItemStack is not null before getting its ItemMeta, or it will mostly likely throw an exception when you interact while holding nothing.

 

@WinX64

I don't know if you meant something else but it already checks.

Code:

if (a == Action.PHYSICAL || is == null || is.getType() == Material.AIR)
        return;

 

Yep, that's exactly what i meant, you just got wrong order in here:

 

@WinX64

*facepalm*
I didn't even notice that. Thank you so much.

Fixed and working.

Fixed Code (open) Fixed Code (close)

Code:

@EventHandler
   public void onPlayerInteract(PlayerInteractEvent event) {
       Action a = event.getAction();
       ItemStack is = event.getItem();
            
    if (a == Action.PHYSICAL || is == null || is.getType() == Material.AIR)
        return;
 
    if(event.getPlayer().getWorld().getName().equals("Spawnworld")) {
        ItemMeta im = is.getItemMeta();
        if (is.getType() == Material.CHEST)
            if(im.hasDisplayName()) {
                if(ChatColor.stripColor(im.getDisplayName()).equals("Info")) {
                    openGUI(event.getPlayer());
                }
            }
          }
        }
     
    }

 

it is like what @WinX64 visually represented.