Coding a cooldown using bukkit server time?

I'm trying to code a feature where the player can only choose a class every 12 hrs but I dont know how I could do this
My Attempt

Code:

if(plugin.getConfig().getLong("players." + player.getDisplayName() + ".lastvote") - plugin.getServer().getWorld("world").getTime() < 864000 && plugin.getConfig().get("players." + player.getDisplayName() + ".lastvote") != null){
                        API.setClass(player, classname);
                        player.sendMessage(ChatColor.GOLD + "" + ChatColor.BOLD + "You have selected the class " + classname + ", You can now spawn into the game!");
                    }else{
                        player.sendMessage(ChatColor.DARK_GREEN + "" + ChatColor.BOLD + "You must vote for the server for this feature! battle-craft.org/vote - battle-craft.org/vote2");
                    }

 

http://wiki.bukkit.org/Scheduler_Programming

 

Dont create threads... Makes no sense. Store the data as metadata / list or in a file and check when the player is doing the event whether the cooldown is gone.

 

No I'm not going to create a scheduler event for each player The way I've done it and i think its working is stored the time the player clicked the time the first time add 12hrs onto it, then check if its greater then the server time.
Like this

Code:

if(plugin.getConfig().getLong("players." + player.getDisplayName() + ".lastvote") + 864000 > plugin.getServer().getWorld("world").getTime() && plugin.getConfig().get("players." + player.getDisplayName() + ".lastvote") != null){
                        API.setClass(player, classname);
                        player.sendMessage(ChatColor.GOLD + "" + ChatColor.BOLD + "You have selected the class " + classname + ", You can now spawn into the game!");
                    }else{
                        player.sendMessage(ChatColor.DARK_GREEN + "" + ChatColor.BOLD + "You must vote for the server for this feature! battle-craft.org/vote - battle-craft.org/vote2");
                    }

 

Gawdzahh you mean 43200000ms / 43200s / 12h

 

Look at my post here: http://forums.bukkit.org/threads/pl...sage-instead-of-spamming.124725/#post-1516701

Suit that to you needs as well as saving the times to a flat file instead of a hashmap