Giving a player items defined in a YAML config

I have a YAML config file which has a list of strings defined with:

Code:

String[] listOfStrings = {"3:64", "266:5", "10:1"};
this.getConfig().set("path.to.list", Arrays.asList(listOfStrings));

This works fine but when I attempt to retrieve and give a player the defined items and amounts it throws a Null Pointer Exception error in this code when i try retrieving the list:

Code:

List<String> items = plugin.getConfig().getStringList("path.to.list");
            PlayerInventory inventory = player.getInventory();
            for(int i=items.size(); i > 0; i++ ) {
                String current = items.get(i);
                String[] current_s = current.split(":");
                Integer howMuch = Integer.parseInt(current_s[1].trim());
                Integer whatToGive = Integer.parseInt(current_s[0].trim());
                ItemStack istack = new ItemStack(whatToGive, howMuch);
                inventory.addItem(istack);
            }

How can I fix the error and give the player the proper amount of the item specified?
Is there a better way? If so point me to it.

 

Why not just use list instead of complicating yourself with arrays ?

I dunno what the null is, could be because you're actually getting a null...

Another exception might be because you're starting at the end of the array, the last object is size - 1 so you're getting it outside it's range.

You should do something like this:

Code:

List<String> items = cfg.getStringList("path.to.list");

if(items != null && items.size() > 0) // always check against null if it's even the slightest possibility of beeing null
{
    for(String itemStr : items) // iterate, don't use indexes and .get() for loops !
    {
        // itemStr is the current item as string.
    }
}

 

Sorry, the null is thrown when I try to define the List<String>.

Also when I try to define the List in the config I get a Illegal Argument Exeception.
Code:

Code:

this.getConfig().set("path.to.list", listOfStrings);

Thanks for your help.

EDIT:

I also tried to define listOfStrings like this but it still gave me an error when I try to put them in a list variable:

Code:

List<String> listOfStrings = new ArrayList<String>();
            listOfStrings.add("25:2");
            listOfStrings.add("3:64");
            listOfStrings.add("266:4");