Not able to execute the command in my custom plugin

I am creating a custom plugin, and I want to create a command which will give the player some items. But I am not able to execute the command, it is showing me --- "Unknown command. Type "/help" for help."

Here are the codes \/

This is the GiveCommand class file\/

Code:

package tk.havenlands.survival.havenlandssurvival.commands;

import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class GiveCommand implements CommandExecutor {

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if(sender instanceof Player){
            Player plr = (Player) sender;
            if(cmd.getName().equalsIgnoreCase("kit")){
                ItemStack sword = new ItemStack(Material.DIAMOND_SWORD, 1);
                ItemStack soup = new ItemStack(Material.MUSHROOM_STEM,17);
                plr.getInventory().addItem(sword,soup);
                plr.sendMessage("Kit has been added to your inventory!");
                return true;
            }
        }
        return false;
    }
}

This is the main file \/

Code:

package tk.havenlands.survival.havenlandssurvival;

import org.bukkit.command.CommandExecutor;
import org.bukkit.plugin.java.JavaPlugin;
import tk.havenlands.survival.havenlandssurvival.commands.GiveCommand;
import tk.havenlands.survival.havenlandssurvival.commands.HelloCommand;

public class HavenLandsSurvival extends JavaPlugin {

    @Override
    public void onEnable() {
        // Plugin startup logic
        System.out.println("Plugin started!");
        getServer().getPluginManager().registerEvents(new Events(), this);

        this.getCommand("hello").setExecutor(new HelloCommand());
        this.getCommand("kit").setExecutor(new GiveCommand());
    }

    @Override
    public void onDisable() {
        // Plugin shutdown logic
        System.out.println("Plugin disabled :(");
    }
}

This is the plugin.yml \/

Code:

name: HavenLandsSurvival
version: 1.0.0
description: Survival plugin for HavenLands
main: tk.havenlands.survival.havenlandssurvival.HavenLandsSurvival

commands:
  hello:
    usage: /<command>
    description: Hello command !

  kit:
    usage: /<command>
    description: Get the kit to figh

Please help me out with these.

 

Any errors in the console?

 

Yes, it is giving me this error.

Code:

java.lang.NullPointerException: Cannot invoke "org.bukkit.command.PluginCommand.setExecutor(org.bukkit.command.CommandExecutor)" because the return value of "tk.havenlands.survival.havenlandssurvival.HavenLandsSurvival.getCommand(String)" is null
        at tk.havenlands.survival.havenlandssurvival.HavenLandsSurvival.onEnable(HavenLandsSurvival.java:14) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:351) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:494) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:408) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.reload(CraftServer.java:876) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.Bukkit.reload(Bukkit.java:642) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServer.java:758) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchServerCommand(CraftServer.java:743) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.DedicatedServer.handleCommandQueue(DedicatedServer.java:387) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:356) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1007) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:846) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:164) ~[server.jar:git-Spigot-37d799b-3eb7236]

 

@MightyAkash The stack trace provided does not seem to match the code provided. Did you change the code before posting this stack trace?

 

No, I didn't change, I just posted this as it was.

 

I have correctly put the path to the main file in plugin.yml. Do I have to put the path to the Commands file also in the plugin.yml?

 

Actually, finally I found out that I had created one more plugin.yml file except that which is already created by the spigot plugin template. I fixed that and now it is working all good.

Thanks a lot for all of your help and support.