Solved Check command sender

i want to check if the console sends a command and give the console the message "ERROR" if it does

Here's the code https://pastebin.com/mNupgCy4

I have the if(!(sender instanceof Player)) but i still get and console message with the following error:

org.bukkit.craftbukkit.v1_12_R1.command.ColouredConsoleSender cannot be cast to org.bukkit.entity.Player

 

@timtower if i use the command as a MC Player i dont want to get the error and i dont get an error if i do. I want the Console to get an error when he tries to use the command /invsee

 

@timtower I see what you meen, I corrected it in my code to:
if (!(sender instanceof Player))

but i still get this error when i type it in the console: rg.bukkit.craftbukkit.v1_12_R1.command.ColouredConsoleSender cannot be cast to org.bukkit.entity.Player

 

@timtower look at the lowest row of this paste bin: https://pastebin.com/yuC7RiWv

ERROR:
Unexpected exception while parsing console command "invsee"
org.bukkit.command.CommandException: Unhandled exception executing command 'invsee' in plugin Fessentials vBETA
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-86aa17f]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit.jar:git-Bukkit-86aa17f]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:621) ~[craftbukkit.jar:git-Bukkit-86aa17f]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:607) [craftbukkit.jar:git-Bukkit-86aa17f]
at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:407) [craftbukkit.jar:git-Bukkit-86aa17f]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [craftbukkit.jar:git-Bukkit-86aa17f]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:650) [craftbukkit.jar:git-Bukkit-86aa17f]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:554) [craftbukkit.jar:git-Bukkit-86aa17f]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_12_R1.command.ColouredConsoleSender cannot be cast to org.bukkit.entity.Player
at xyz.fluffyme.fessentials.main.onCommand(main.java:26) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-86aa17f]
... 8 more

im creating this plugin for learning purpose so that explains the commands

 

@timtower that was the error thanks, can i ask you a quick question? How did you learn bukkit/java??

 

You could just do

Code:

if(sender instanceof ConsoleCommandSender) {
    sender.sendMessage("ERROR");
}

Also, I suggest using if(sender instanceof Player) instead of Player p = (Player) sender, especially when you write it in the beginning of the onCommand method.