need help with my gamemode plugin

hello.
i made an gamemode plugin. but now as i do /gm 1 . i see an no permission message for changing other players their gamemode ( that I made) and my gamemode is at the same time changed to creative.
but how to get rid of that message as i want to change only my gamemode without the gamemode change others permission?
here's my build:

Code (Text):

package main;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

public class main extends JavaPlugin implements Listener {

    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }

    @Override
        public boolean onCommand(CommandSender s, Command cmd, String CommandLabel, String[] args) {
        if (s instanceof Player) {
            Player p = (Player) s;
            if (cmd.getName().equalsIgnoreCase("gamemode")) {
                if (!p.hasPermission("gamemode.change")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions!");
                    return true;
                }
            }
            if (args.length == 0) {
                s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "use /gm <gamemode> [player]");
                return true;
            }
            {
                if (args.length == 1) {
                    if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c") || args[0].equalsIgnoreCase("creative") || args[0].equalsIgnoreCase("crea")) {
                        GM.changeGamemode(GM.CREATIVE, p);
                    }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a") || args[0].equalsIgnoreCase("adventure")) {
                        GM.changeGamemode(GM.ADVENTURE, p);
                    }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp") || args[0].equalsIgnoreCase("spectator")) {
                        GM.changeGamemode(GM.SPECTATOR, p);
                    }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s") || args[0].equalsIgnoreCase("sur") || args[0].equalsIgnoreCase("survival")) {
                        GM.changeGamemode(GM.SURVIVAL, p);
                    }
                }
            }
            {
                if (!p.hasPermission("gamemode.change.others")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions to change other players gamemode!");
                    return true;
                }
                if (args.length == 2) {
                    Player target = Bukkit.getServer().getPlayer(args[1]);
                    if (target == null) {
                        s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "can't find that player!");
                        return true;
                    }
                    if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c") || args[0].equalsIgnoreCase("creative") || args[0].equalsIgnoreCase("crea")) {
                        GM.changeGamemode(GM.CREATIVE, target);
                    }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a") || args[0].equalsIgnoreCase("adventure")) {
                        GM.changeGamemode(GM.ADVENTURE, target);
                    }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp") || args[0].equalsIgnoreCase("spectator")) {
                        GM.changeGamemode(GM.SPECTATOR, target);
                    }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s") || args[0].equalsIgnoreCase("sur") || args[0].equalsIgnoreCase("survival")) {
                        GM.changeGamemode(GM.SURVIVAL, target);
                    }
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.AQUA + "you changed the gamemode of: " + ChatColor.RED + target.getDisplayName());
                    target.sendMessage("§a[§bGameMode§a] " + ChatColor.GOLD + "your gamemode is changed by " + ChatColor.RED + s.getName());
                    }
            }
        }
        return false;
    }
}

i can't see what i doing wrong.
why is that message showing up?

EDIT:
i think i got it but i test it right now. i think that my plugin.yml was a little bit bugged because i made there an all pemission in and i deleted that now

 

no. it was not the gamemode.* permission in the plugin.yml . but i get 2 messages: 1 is that my own gamemode is changed and the other one is that i got no permissions to change other players their gamemode.

 

yes that's what i want. and as i do /gm 1 [player] then i want that message

 

the code does work but i have 2 messages when i do /gm 1. without the player

Code (Text):

package main;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

public class main extends JavaPlugin implements Listener {
 
    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }
 
    @Override
        public boolean onCommand(CommandSender s, Command cmd, String CommandLabel, String[] args) {
        if (s instanceof Player) {
            Player p = (Player) s;
            if (cmd.getName().equalsIgnoreCase("gamemode")) {
                if (!p.hasPermission("gamemode.change.own")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions!");
                    return true;
                }
            }
            if (args.length == 0) {
                s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "use /gm <gamemode> [player]");
                return true;
            }
            {
                if (args.length == 1) {
                    if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c") || args[0].equalsIgnoreCase("creative") || args[0].equalsIgnoreCase("crea")) {
                        GM.changeGamemode(GM.CREATIVE, p);  
                    }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a") || args[0].equalsIgnoreCase("adventure")) {
                        GM.changeGamemode(GM.ADVENTURE, p);
                    }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp") || args[0].equalsIgnoreCase("spectator")) {
                        GM.changeGamemode(GM.SPECTATOR, p);
                    }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s") || args[0].equalsIgnoreCase("sur") || args[0].equalsIgnoreCase("survival")) {
                        GM.changeGamemode(GM.SURVIVAL, p);
                    }  
                }
            }
            {
                if (!p.hasPermission("gamemode.change.others")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions to change other players gamemode!");
                 
                }
                if (args.length == 2) {
                    Player target = Bukkit.getServer().getPlayer(args[1]);
                    if (target == null) {
                        s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "can't find that player!");
                        return true;
                    }
                    if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c") || args[0].equalsIgnoreCase("creative") || args[0].equalsIgnoreCase("crea")) {
                        GM.changeGamemode(GM.CREATIVE, target);  
                    }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a") || args[0].equalsIgnoreCase("adventure")) {
                        GM.changeGamemode(GM.ADVENTURE, target);
                    }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp") || args[0].equalsIgnoreCase("spectator")) {
                        GM.changeGamemode(GM.SPECTATOR, target);
                    }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s") || args[0].equalsIgnoreCase("sur") || args[0].equalsIgnoreCase("survival")) {
                        GM.changeGamemode(GM.SURVIVAL, target);
                    }
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.AQUA + "you changed the gamemode of: " + ChatColor.RED + target.getDisplayName());
                    target.sendMessage("§a[§bGameMode§a] " + ChatColor.GOLD + "your gamemode is changed by " + ChatColor.RED + s.getName());
                    }
            }
        }
        return false;
    }
}

EDIT:
what do you mean exacly? i am an noob at programming of plugins btw

 

plugin.yml:

Code (Text):

name: gamemode
version: 1
main: main.main

commands:
   gamemode:
     description: set your gamemode
     aliases: [gm]

permissions:
   gamemode.change.own:
     description: set the gamemode of yourself
     default: false
   gamemode.change.others:
     description: set other players gamemode
     default: false

build:

Code (Text):

package main;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

public class main extends JavaPlugin implements Listener {
   
    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }
   
    @Override
        public boolean onCommand(CommandSender s, Command cmd, String CommandLabel, String[] args) {
        if (s instanceof Player) {
            Player p = (Player) s;
            if (cmd.getName().equalsIgnoreCase("gamemode") || cmd.getName().equalsIgnoreCase("gm")) {
                if (!p.hasPermission("gamemode.change.own")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions!");
                    return true;
                }
            }
            if (args.length == 0) {
                s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "use /gm <0,1,2,3 >[player]");
                return true;
            }
            {
                if (args.length == 1) {
                    if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c") || args[0].equalsIgnoreCase("creative") || args[0].equalsIgnoreCase("crea")) {
                        GM.changeGamemode(GM.CREATIVE, p);  
                    }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a") || args[0].equalsIgnoreCase("adventure")) {
                        GM.changeGamemode(GM.ADVENTURE, p);
                    }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp") || args[0].equalsIgnoreCase("spectator")) {
                        GM.changeGamemode(GM.SPECTATOR, p);
                    }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s") || args[0].equalsIgnoreCase("sur") || args[0].equalsIgnoreCase("survival")) {
                        GM.changeGamemode(GM.SURVIVAL, p);
                    }  
                }
                if (!p.hasPermission("gamemode.change.others")) {
                    s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "you don't have permissions!");
                    return true;
                }
            }
            if (args.length == 2) {
                Player target = Bukkit.getServer().getPlayer(args[1]);
                   if (target == null) {
                       s.sendMessage("§a[§bGameMode§a] " + ChatColor.RED + "can't find that player!");
                       return true;
                   }
                   if (args[0].equalsIgnoreCase("1") || args[0].equalsIgnoreCase("c")) {
                       GM.changeGamemode(GM.CREATIVE, target);  
                   }else if (args[0].equalsIgnoreCase("2") || args[0].equalsIgnoreCase("a")) {
                       GM.changeGamemode(GM.ADVENTURE, target);
                   }else if (args[0].equalsIgnoreCase("3") || args[0].equalsIgnoreCase("spec") || args[0].equalsIgnoreCase("sp")) {
                       GM.changeGamemode(GM.SPECTATOR, target);
                   }else if (args[0].equalsIgnoreCase("0") || args[0].equalsIgnoreCase("s")) {
                       GM.changeGamemode(GM.SURVIVAL, target);
                   }
                   s.sendMessage("§a[§bGameMode§a] " + ChatColor.AQUA + "you changed the gamemode of: " + ChatColor.RED + target.getDisplayName());
                   target.sendMessage("§a[§bGameMode§a] " + ChatColor.GOLD + "your gamemode is changed by " + ChatColor.RED + s.getName());
            }
        }
        return false;
    }
}

 

I can't find good tutorials....

 

i found an solution on another forum. it's has to be under the args.length == 2 line the second permission