How to use scheduleSyncDelayedTask [Noob Question]

I am trying to use scheduleSyncDelayedTask as documented here:
http://wiki.bukkit.org/Scheduler_Programming#Delayed_Tasks

My problem is that the method calls for a Plugin, which I don't seem to have :/ What do I put for that argument?

Thanks!

 

You need to define your main class inside the class that your task is located in like this:

Code:

private yourmainclass plugin;       
public yourcurrentclass (yourmainclass plugin) {
    this.plugin = plugin;
}

 

If it's in your main class, then just use the reserved word 'this,' since your main class SHOULD (to work) be derived from JavaPlugin.

 

I originally had it in the main class but because of the 1st reply I made a new class for it (I tried using "this" but it gave me errors with being/not being static everywhere).

Here's what my new class looks like, I'm getting errors that plugin cannot be null :/

Code:

public class HelperFunctions {
    
    private static HungerGames plugin;       
    
    public HelperFunctions (HungerGames plugin) {
        this.plugin = plugin;
    }
    
    
    public static void registrationOpen(){
        Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
               public void run() {
                   Bukkit.getServer().broadcastMessage("This message is broadcast by the main thread.");
               }
            }, 100L);
        
    }

 

this refers the current instance of the class it is written in. in this case, you would actually use the variable name.

 

Yes because you're using a static reference to the registrationOpen method, and due to you not instantiating it (HelperCommands), plugin is never set thus returning a NPE.

 

I'm very confused :/ What do I need to change to make this work?

Could someone tell me what I need to change? Thanks!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

You're probably just doing HelperFunctions.registrationOpen(); somewhere, but you haven't given a way for the static HungerGames 'plugin' reference to be initialized. Is there a reason for this to be static?

PHP:

// HungerGames.java
public class HungerGames extends JavaPlugin {
    private static HungerGames instance;
    public void onEnable(){
      instance = this;
    }
    public static HungerGames getInstance(){
        return instance;
    }
}
// HelperFunctions.java
public class HelperFunctions {
    public static void registrationOpen(){
        Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(HungerGames.getInstance(), new Runnable() {
              public void run() {
                  Bukkit.getServer().broadcastMessage("This message is broadcast by the main thread.");
              }
        }, 100L);
    }
}


 

Awesome VeryBigCorp, thanks!! Problem solved.

 

No problem! Just like to help

 

Oh and btw I have some ideas in mind of how to fix this but I am curious to know if doing this.cancel() at the end of each runnable will take care of it just like that? Thanks!