Help with Error: expected unqualified-id before 'public'

Let me start off by saying I have absolutely no idea what I’m doing. I’m using code that was provided to me but it’s missing the first 6 lines of code and have no way of contacting the original coder. I attached an image of the code I was provided and the error I get when trying to upload it. I’m hoping someone can figure out what I’m missing or why it’s giving me this error. Sorry if I’m not being much help but like I said I have no idea what I’m supposed to be doing

public class Main
{
  public static void main(string[] args) throws IOEcception, InterruptedException
  {
    IODevice device = new Firmatadevice (portname: "COM4");
    device.start();
    device.ensureInitializationIsDone();

    for (int i - 0; i < 5; i++)
    {
      turnOn(device);
      System.out.println("On");
      Thread.sleep(millis:250);
      System.out.println("Off");
      turnoff(device);
      Thread.sleep(millis:1000);
    }
    device.stop();
  }

  private static void turnOn(IODevice device)
  {
    try
    {
      device.getPin(i:7).setMode(Pin.Mode.OUTPUT);
      device.getPin(i:7).setValue(350);
      device.getPin(i:13).setMode(Pin.Mode.INPUT); 
    } catch (IOException e)
    {
      e.printStackTrace();
    }
  }

  private static void turnOff(IODevice device)
  {
    try
    {
      device.getPin(i: 7).setMode(Pin.Mode.INPUT);
    } catch (IOException e)
    {
      e.printStackTrace();
    }
  }
}

Error message:
minecraftshocker:2:1: error: expected unqualified-id before ‘public’
public class Main
^~~~~~
exit status 1
expected unqualified-id before ‘public’

Thanks in advance for your help!

That‘S .NET C# code.

Arduino IDE platform uses C++. Completely (well technically speaking) different…

pcbbc:
That‘S .NET C# code.

Arduino IDE platform uses C++. Completely (well technically speaking) different...

oh, well that definitely explains why it's not working for me then. So how would someone be able to use an Arduino with .NET C# code then? I know the original coder was using a Minecraft plugin (Which is Java if I'm not mistaken) to control an Arduino Uno with the code provided.

So how would someone be able to use an Arduino with .NET C# code then? I know the original coder was using a Minecraft plugin (Which is Java if I'm not mistaken) to control an Arduino Uno with the code provided.

I did not analyse the code maybe it's that part that is running on the PC

I qoute again your words " to control an Arduino Uno with the code provided"

best regards Stefan

Control an Arduino UNO and run code ON an Arduino UNO are two separate things.

You cannot run .NET code on an Arduino. This code was running at the host end.

Perhaps better explain why you are trying communicate with and from where.

Edit: also, if this code ever did compile on the system it was intended for, it has obviously be modified since…

 for (int i - 0; i < 5; i++)

Control an Arduino UNO and run code ON an Arduino UNO are two separate things.

After my last message, I started to realize this. I did some more searching and found that the code was made on IntelliJ IDEA and not on Arduino IDE.

Perhaps better explain why you are trying communicate with and from where.

Basically what I’m trying to do is recreate a Minecraft Plugin that tells an Arduino UNO to send a signal to a Shock Collar anytime I take damage in-game. A YouTuber has already coded it and provided the code I originally posted along with this code for the Plugin

import com.sun.media.sound.MidiOutDeviceProvider;
import org.Firmata4j.firmata.FirmataDevice
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.scheduler.BukkitTask;
import sun.jvm.hotspot.ui.ObjectHistogramPanel;

import java.io.IOException

public class Minecraftshocker extends JavaPlugin implements Listener
{
    private static Minecraftshocker instance;

    private IODevice device

    @Override
    public void onEnable()
    {
        instance = this;
        getServer().getPluginManager().registerEvents(listener:this, plugin:this;);

        System.out.println("Connecting to Device...");
        device = new firmataDevice(portName:"COM4");

        try
        {
            device.start();
            device.ensureInitiallizationIsDone();
            System.out.println("Connected to device!");
            Thread.sleep(millis:1000);
            shock();
        } catch (IOException | InterruptedException e)
        {
            e.printStackTrace();
        }
    }

    @Override
    public void onDisable()
    {
        try
        {
            device.stop();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
        instance = null;
    }

    @EventHandler
    public void onEntityDamageEvent(EntityDamageEvent event)
    {
        Player player = (Player) event.getEntity();

        if (Player.getName().equals("ItsProHD"))
        {
            shock();
        }
    }
}

private BukkitTask task = null;

private void shock()
{
    new BukkitRunnable()
    {
        @Override
        public void run()
        {
            turnOn(device);

            try
            {
                Thread.sleep(millis:100);
                turnOff(device)
            } catch (InterruptedException e)
            {
                turnOff(device);
            }

            if (task |= null && |task.isCancelled())
            {
                task.cancel();
            }

            task = new BukkitRunnable()
            {
                @Override
                public void run()
                {
                    shock();
                }
            }.runTaskLater(instance, delay:20 * 33);
        }
    }.runTask(plugin:this;);
}

I now know all the code that was provided was created on IntelliJ IDEA. I also did some more research and found that the plugin somehow uses a thing called “Firmata protocol” to allow the Arduino to communicate with the Plugin. So I guess now I’m more so trying to figure out how exactly I can code my uno to work with the plugin code that was provided and also why I have so many errors when I put the plugin code in IntelliJ.