NPE Help

Hey friends, I am trying to make a shop plugin, but when I exacute my command to open the shop, I am getting this error:

Error (open) Error (close)

[20:36:17 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'ukit
' in plugin UHCShop v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[cra
ftbukkit.jar:git-Bukkit-501372f]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:14
0) ~[craftbukkit.jar:git-Bukkit-501372f]
at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServe
r.java:625) ~[craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerCon
nection.java:1082) [craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java
:942) [craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(SourceFile:37) [craft
bukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(SourceFile:9) [craftb
ukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:1
3) [craftbukkit.jar:git-Bukkit-501372f]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_31]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [craftbukki
t.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:6
70) [craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:3
36) [craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:6
26) [craftbukkit.jar:git-Bukkit-501372f]
at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java
:534) [craftbukkit.jar:git-Bukkit-501372f]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.NullPointerException
at me.Zacx.UHCShop.openUHCShop(UHCShop.java:97) ~[?:?]
at me.Zacx.UHCMain.onCommand(UHCMain.java:79) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[cra
ftbukkit.jar:git-Bukkit-501372f]
... 15 more

Here is line 97 from UHCShop

Code:Java

 
        if (UHCMain.getOwnedKits().get(p.getUniqueId()).contains(itemOneType) == true) {
 

and line 79 is calling a method that has the line above in it.
getOwnedKits is a getter that returns this

Code:Java

 
    public static HashMap<UUID, ArrayList<Material>> ownedKits = new HashMap<>();
 

 

Check if the player actually has a UHC kit first (i.e check if it is not null), and why have ==true? When you use an if statement, it checks if it is true or false already..