Command 2.0 Tutorial Source

// onEnable calling method
public void onEnable() {
    getCommand("kick").setExecutor(new KickCommand(this)); // Creates new command
}

// onCommand method
public boolean onCommand(CommandSender sender, Command cmd, String string, String[] args) {
    Player player = (Player) sender; // Player variable
    if(cmd.getName().equalsIgnoreCase("kick")) { // Command checking
        if(player.hasPermission("example.kick")) { // Permission checking
            if(args.length == 1) { // 1 argument (player)
                Player toKick = Bukkit.getPlayer(args[0]); // Player to kick variable
                toKick.kickPlayer("kicked by " + player.getDisplayName()); // Kicks player
                player.sendMessage(toKick.toString() + " has been kicked."); // Tells kicked
                return true; // Returns true that operation is done sucessfully.
            }
            // BONUS!
            if(args.length == 2) { // 2 argument (player) (reason)
                Player toKick = Bukkit.getPlayer(args[0]); // Player to kick variable
                String reason = (args[1]); // Reason variable
                toKick.kickPlayer(reason); // Kicks player for reason
                player.sendMessage(toKick.toString() + " has been kicked. (reason: " + reason + ")."); // Tells that player has been kicked for reason
                return true; // Returns true that the operation is done sucessfully
            }
        }
    }
    return false; // if command is unsuccessful, returns usage.
}