Register Api Help

Alright so I'm working my first plugin and I'm attempting to use the register api to subtract from an account however I'm getting a null pointer after converting string argument to double. I've used many different ways of converting it however. I believe the issue is from the method I'm trying to use to subtract from the account. Does anyone have a allinone dummy subtract Method that I could possibly try? I'm just in the process of adding features at the moment. I currently have the Method onEnable and Disable. All that abstract is messing with my head.

 

I think it will be easier for us if we have a part of the source code

 

Maybe post the error and the method that causes the error?

 

I'd rather use the Vault API, it's much easier.

 

I took the advice and switched to vault but I'm having an issue with converting a string argument to a double and not getting a nullpointer. However economy.withdraw(String p, Double amt); is easier then creating a method through register. Just making sense of the abstract coding was irrating.
CODE:
//Command Sender
public boolean onCommand(CommandSender sender, Command command, String commandLabel, String[] args) {
String commandName = command.getName().toLowerCase(); String[] trimmedArgs = args;
if(commandName.equals("fine")){
return fine(sender, trimmedArgs); //NullPointer
}}
private
boolean fine(CommandSender sender, String[] args){
boolean auth = false;
Player player =
null;
String admin =
"server";
if (sender instanceof Player){
player = (Player)sender;
if (Permissions.Security.permission(player, "ultraban.fine")) auth = true;
admin = player.getName(); }
else{
auth =
true;
}
if (!auth){
sender.sendMessage(ChatColor.
RED + "You do not have the required permissions.");
return true;
}//FUNCTIONING Permissions DON'T Touch
if (args.length < 1) return false; String p = args[0];
if(autoComplete) p = expandName(p);
Player victim =
this.getServer().getPlayer(p);
boolean broadcast = true;
String amt ="0"; //set default string
if
(args.length > 1){
if(args[1].equalsIgnoreCase("-s")){ //Attempt to hide punishments
String amt = args[2]; broadcast =
false;

}
else{
String amt = args[1];
} }
//Tried all of these
//Double amt = parseFine(amtd);
//float amtd = (Float.valueOf(amt) ).floatValue();
//Double amt = Double.valueOf(amtd);
//Double amtd = Double.parseDouble(amt);
//String amt = String.valueOf(amtd);
if(victim != null){ //cant use(victim.isOnline())null pointer
if(broadcast = false){ //If silent wake his ass up
victim.sendMessage(
"blahblah"); }else{
this
.getServer().broadcastMessage("blahblah"));
}
economy.withdrawPlayer(p,amtd); //new nullpointer (string, double)
}
else{
sender.sendMessage(ChatColor.
GRAY + "Player must be online!");
return true;
}//something to that extent and yah I write alot of notes, still kinda learning

Wow formatting fail... Any ideas? the amount or (amt) variables can go either way I tried several different ways and even created a method to Convert and still No dice.. is there a standard way to convert from string to double or am I missing something
The command goes as /fine {player} {amount}

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

 

Double.parseDouble() should work fine there. Be sure to catchNumberFormatException. What isn't working, exactly?

 

Well I guess the boiled the problem down to

economy.withdrawPlayer(String, Double);

I keep getting a nullpointer off this line, that and the exception from running the command. Now my biggest problem is that Vault (which I haven't fully checked the source) requires the player to be in a string format and the amount to withdraw to be double. Which after further study of the all knowing Oracle site. I'm using the

double amtd = Double.valueOf(amt.trim());
I'm also having it catch for NumberFormatExceptions leaving a nice message to type a number next time.

//Thanks desht forgot about that.

and even using Math.abs(amtd) for the absolute value of the double.
So I think it might be with the Player in string format.

I'm trying to use p.getName() or victim.toString() but I'm not sure how to parse the variable to be a usable format for Vault.

 

Your economy is null, that's why you get the NPE.

 

public static Economy economy;
(class from vault)

 

Your declaration doesn't help, you need to call this method

Code:java

 
    private Boolean setupEconomy()
    {
        RegisteredServiceProvider<Economy> economyProvider = getServer().getServicesManager().getRegistration(net.milkbowl.vault.economy.Economy.class);
        if (economyProvider != null) {
            economy = economyProvider.getProvider();
        }
 
        return (economy != null);
    }
 

somewhere in onEnable() and also add a dependency for Vault.

 

Gotcha.... booting eclipse and hoping for the best. Pretty sure I was using something to the effect onEnable but I'll most likely need the method. I'll let you know the outcome. I do know its registering iConomy 6.

Wow..... Pandemoneus worked like a charm. That method was the link that I was missing.
then a simple.
if(this.setupEconomy()){
double amtd = Double.valueOf(amt.trim()); //Amount Trimmed
economy.withdrawPlayer(victim.toString(), Math.abs(amtd)); //Amount Absolute Value
}
and WHAMMY.. Appreciations are in order. Now I'm getting one step closer to completing this thing and releasing.

Now I must do alot of cleaning. I put way to many Notes.

Well maybe not like a charm. Still doesn't withdraw the amt however no NPE's I'll figure out the issue... should be simple from here.

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