UnsupportedOperationException at java.util.AbstractList.add

Question

I\'m having issues getting a block of code to run properly. I\'m not entirely sure WHAT this code does (I\'m trying to get a plugin that\'s out of date to work properly with

Answer 1

I think I've worked out your problem. Arrays.asList(item.getStock()) returns a fixed size list based on the Array passed to it.

This means you cannot add more elements to it.

Instead you should do new ArrayList(Arrays.asList(item.getStock())).

This way you are creating a new list that you can add to.