plugin command /<command> <player> <message>

I just finished making a very simple plugin (just to start studying Java) with the command / ereport [player] [message], only the problem is that I can't make sure that in the third space (message) where the player should enter a message, instead of suggesting a player in the game, suggest . Explain better ... you know the command /tell? it's kind of the same thing. I would like it to come out like /tell and not /tell ...

Here is what i have done:

Code:

package mc.trnetwork.cf.easyreport.commandsER;

import mc.trnetwork.cf.easyreport.Main;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

public class ReportCmd implements CommandExecutor {
    private final Main main;

    public ReportCmd(Main main){
        this.main = main;
    }

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (args.length == 0){
        if (sender instanceof Player){
        Player player = (Player) sender; //take the name of the player that call command
        }else{
            main.getLogger().info("You cannot report players from console!");
            return true;
        }
        } else{
            if (Bukkit.getPlayerExact(args[0]) != null){
                Player MessToPlayerReported = (Player) Bukkit.getPlayerExact(args[0]);
                MessToPlayerReported.sendMessage(ChatColor.RED + "HEY! you got reported, please stop or...");
                if (sender instanceof Player){
                    Player PlayerWhoReported = (Player) sender;
                    PlayerWhoReported.sendMessage(ChatColor.GREEN + "You have reported \"" + args[0] + "\"!");
                } else {
                    Bukkit.getLogger().info(ChatColor.RED + "Player \"" + args[0] + "\" was reported!");
                }
            } else {
                if (sender instanceof Player){
                    Player PlayerWhoReported2 = (Player) sender;
                    PlayerWhoReported2.sendMessage(ChatColor.RED + "Player \"" + args[0] + "\" was not found!");
                } else {
                    Bukkit.getLogger().info("Player \"" + args[0] + "\" was not found!");
                }
            }
        }
        return true;
    }
}

Honestly, I don't even know where I should change to do this

 

You can use a tabcompleter.
https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/command/TabCompleter.html

 

mmm i checked some tutorials about tab completer, but is not i want, i like the tab completer for the player, but after have writed the player, i want that the user writes the message without the player's completer, using comand /tell, after writing the player, the bar pop up "<message>", and i want to do the same. but still interesting what you send to me about tab completer.

 

@TizFaver you can use tabcompleter and set completions to null to stop completions from showing up.