Internal error if you dont finish your command

ok so for my PotionEffectcmds, and one of my commands is /blind (user) (duration) but when i just do /blind or /blind (user) it gives me an internal error, can someone help me out?

 

this is for /invs DedosThreat

Code:

[12:34:11 ERROR]: null org.bukkit.command.CommandException: Unhandled exception executing command 'invs' in plugin PotionsEffectCmds v1.2     at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1397) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1232) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_172]     at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_172]     at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at java.lang.Thread.run(Thread.java:748) [?:1.8.0_172] Caused by: java.lang.ArrayIndexOutOfBoundsException: 1     at me.DedosThreat.PluginMain.onCommand(PluginMain.java:44) ~[?:?]     at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     ... 15 more

this is for /invs

Code:

12:34:53 ERROR]: null org.bukkit.command.CommandException: Unhandled exception executing command 'invs' in plugin PotionsEffectCmds v1.2     at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1397) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1232) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_172]     at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_172]     at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     at java.lang.Thread.run(Thread.java:748) [?:1.8.0_172] Caused by: java.lang.ArrayIndexOutOfBoundsException: 1     at me.DedosThreat.PluginMain.onCommand(PluginMain.java:44) ~[?:?]     at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-6103339]     ... 15 more [12:34:55 INFO]: [BuycraftX] Updating coupon list...

and this is my code

Code:

package me.DedosThreat;
import java.util.Random;
import java.util.logging.Logger;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.Event;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
import org.yaml.snakeyaml.events.Event.ID;
public class PluginMain extends JavaPlugin{
    public final Logger logger = Logger.getLogger("Minecraft");
    public static PluginMain plugin;
    @Override
public void onEnable() {
    getLogger().info(ChatColor.DARK_AQUA + "Plugin Successfully Enabled :)");
    PluginManager pm = getServer().getPluginManager();
  }
   @Override
public void onDisable( ) {
  }
@SuppressWarnings("deprecation")
public boolean onCommand(CommandSender Sender, Command cmd, String lable, String[] args) {
Player player = (Player) Sender;
//int
int s = Integer.parseInt(args[1]);
//int
//Potion effect list start
PotionEffect blind = new PotionEffect(PotionEffectType.BLINDNESS, s * 20, 255);
PotionEffect invs = new PotionEffect(PotionEffectType.INVISIBILITY, s * 20, 255);
PotionEffect strength = new PotionEffect(PotionEffectType.INCREASE_DAMAGE, s * 20, 255);
PotionEffect poison = new PotionEffect(PotionEffectType.POISON, s * 20, 255);
PotionEffect glow = new PotionEffect(PotionEffectType.GLOWING, s * 20, 255);
//Potion effect list end
//Blind 
if(cmd.getName().equalsIgnoreCase("Blind")&& Sender instanceof Player) {
    if(args.length==2) {
    Player user = player.getServer().getPlayer(args [0]);
    if(user==null) player.sendMessage(ChatColor.RED + "Invalid Player");
    user.addPotionEffect(blind);
    player.sendMessage(ChatColor.GREEN + "Blinded!");}
    else {
        player.sendMessage(ChatColor.DARK_RED + "Invalid usage!" + ChatColor.RED + "/Blind <player> <Duration>");       
    }
    return true;       
}
//Invs
if(cmd.getName().equalsIgnoreCase("Invs")&& Sender instanceof Player) {
    if(args.length==2) {
    Player user = player.getServer().getPlayer(args [0]);
    if(user==null) player.sendMessage(ChatColor.RED + "Invalid Player");
    user.addPotionEffect(invs);
    player.sendMessage(ChatColor.GREEN + "Player has been become Invs");}
    else {
        player.sendMessage(ChatColor.DARK_RED + "Invalid usage!" + ChatColor.RED + "/Invs <player> <Duration>");       
    }
    return true;       
}
//Strong
if(cmd.getName().equalsIgnoreCase("Strong")&& Sender instanceof Player) {
    if(args.length==2) {
    Player user = player.getServer().getPlayer(args [0]);
    if(user==null) player.sendMessage(ChatColor.RED + "Invalid Player");
  user.addPotionEffect(strength);
    player.sendMessage(ChatColor.GREEN + "Player has been Strengthened");}
    else {
    player.sendMessage(ChatColor.DARK_RED + "Invalid usage!" + ChatColor.RED + "/Strong <player> <Duration>");       
    }
    return true;       
}
//Poison
if(cmd.getName().equalsIgnoreCase("Poison")&& Sender instanceof Player) {
    if(args.length==2) {
    Player user = player.getServer().getPlayer(args [0]);
    if(user==null) player.sendMessage(ChatColor.RED + "Invalid Player");
  user.addPotionEffect(poison);
    player.sendMessage(ChatColor.GREEN + "Player has been Poisoned");}
    else {
        player.sendMessage(ChatColor.DARK_RED + "Invalid usage!" + ChatColor.RED + "/Poison <player> <Duration>");       
    }
    return true;       
}
//Glow
if(cmd.getName().equalsIgnoreCase("Glow")&& Sender instanceof Player) {
    if(args.length==2) {
    Player user = player.getServer().getPlayer(args [0]);
    if(user==null) player.sendMessage(ChatColor.RED + "Invalid Player");
  user.addPotionEffect(glow);
    player.sendMessage(ChatColor.GREEN + "Player has been Glowed");}
    else {
        player.sendMessage(ChatColor.DARK_RED + "Invalid usage!" + ChatColor.RED + "/Glow <player> <Duration>");       
    }
    return true;       
}
return false;
} }

 

meaning?
***im confused***

 

Meaning you are trying to get a numeric value of something that may not exist before doing a arguments length validation.

 

sorry..... im still confused....

 

@DedosThreat You have to check if the arguments are set before using them.