my Main.java

public class Main extends JavaPlugin{

         private Laser laser;

        @Override
        public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
             if (cmd.getName().equalsIgnoreCase("Laserset")) {

                 if(!(sender.hasPermission("GuardianLaser.set"))) {
                     sender.sendMessage("You do not have permission to use this command (GuardianLaser.set)");
                 } else {
                     if(args.length != 8) {
                         if(args.length < 8) sender.sendMessage("Not enough arguments. usage: /laserset x1 y1 z1 x2 y2 z2 world Duration(InTicks) ViewDistance");
                         if (args.length > 9) sender.sendMessage("Too many arguments. usage: /laserset x1 y1 z1 x2 y2 z2 world Duration(InTicks) ViewDistance");
                     } else {

                         Location loc1 = new Location(Bukkit.getWorld(args[6]), Double.parseDouble(args[0]),Double.parseDouble(args[1]),Double.parseDouble(args[2]));
                         Location loc2 = new Location(Bukkit.getWorld(args[6]), Double.parseDouble(args[3]),Double.parseDouble(args[4]),Double.parseDouble(args[5]));

                         try {
                            this.laser = new Laser(loc1, loc2, Integer.parseInt(args[7]), Integer.parseInt(args[8]));

                            this.laser.start(Main.this);

                        } catch (ReflectiveOperationException e) {
                            e.printStackTrace();
                            sender.sendMessage("there was a ReflectiveOperationException!");
                        }

                     } return false;
             }




             if (cmd.getName().equalsIgnoreCase("Laserstop")) {
                 if(sender.hasPermission("GuardianLaser.stop")){
                     this.laser.stop();
                 }
             }
            return true;
        }
            return false;
}
}