I am unable to add an element to a list? UnsupportedOperationException

Question

This one list object is biting me in the butt.. Any time I try to add an element to it, it produces this: ``` Caused by: java.lang.UnsupportedOperationException at java.util.AbstractList.add(AbstractList.java:148) at java.util.AbstractList.add(AbstractList.java:108) ``` The line producing the error is insignificant, but here it is anyways: ``` AdventureLobbies.players.add(args[0].toLowerCase()); ``` Should I not be accessing it statically? Actual declaration of variable: `AdventureLobbies.players = Arrays.asList(rs.getString("players").toLowerCase().split(","));` Any ideas? Can't find anything on Google that's worthwhile.

Accepted Answer

Arrays.asList() will give you back an unmodifiable list, and that is why your add is failing. Try creating the list with:

```
AdventureLobbies.players = new ArrayList(Arrays.asList(rs.getString("players").toLowerCase().split(",")));
```

I am unable to add an element to a list? UnsupportedOperationException

Solution

Problem