List<String> Problem!

Hello, i have been developing my first plugin, and i come across this error while trying to do something. Here is my source code for the troublesome part:

Code:

    public void EntityPortal(EntityPortalEvent event) {
        List<String> pfm = plugin.getConfig().getStringList("blocked-mobs");
        if (pfm.contains(event.getEntityType().toString())) {
            event.setCancelled(true);
            System.out.println("The Mob " + event.getEntityType().toString() + " Has Tried To Use A Portal!");
        }
    

Aaaaaand it gives me this error on the List part:

How can i go about fixing this?

 

Well, which List are you importing? If it's java.awt.list, then it's not parameterized. You need java.util.list.

 

Try:
ArrayList<String> pfm = plugin.getConfig().getStringList("blocked-mobs");

I don't know exactly why, but I think List may just be an abstract class or something along those lines. You need a class that implements List such as ArrayList.

EDIT: It would be nice for someone to correct me on that.

 

Alright then

List is an interface, and it's perfectly OK to say "List<String> list = something-or-other"

Good programming practice is to program to interfaces rather than concrete classes, so it's better to make your data types interface types where possible. You use the concrete class (such as ArrayList) to instantiate your objects, e.g.:

Code:

List<String> list = new ArrayList<String>();

http://stackoverflow.com/questions/383947/what-does-it-mean-to-program-to-an-interface

Oh, and I'm guessing bitWolfy has the right solution - TheCanadianLizard check which List class you're actually importing.

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

 

Thanks Wolf, apparently i did import java.awt.list XD