Solved Very strange UnsupportedOperationException on ArrayList - Can't figure it out ...

So, this is my code. It's a simple plugin that should just count my name in private chat and public chat:
WoutCount class (I left out some code, full source at the end of the thread):

Code:java

public class WoutCount extends JavaPlugin implements Listener, CommandExecutor {
 
private List<Score> highscores = new ArrayList<Score>();
 
//Enable, disable and commandlistener here
 
@EventHandler
public void onCommandPreprocess(PlayerCommandPreprocessEvent event) {
if((event.getMessage().toLowerCase().contains("r") || event.getMessage().toLowerCase().contains("msg")) && event.getMessage().toLowerCase().contains("wout")){
reCalculateScores(event.getPlayer());
}
}
 
@EventHandler
public void onPlayerChat(final AsyncPlayerChatEvent event) {
if(event.getMessage().toLowerCase().startsWith("wout") || event.getMessage().toLowerCase().contains("wout")){
reCalculateScores(event.getPlayer());
}
}
 
private void saveHighScores(){
//save code, works fine
}
 
private void loadHighScores(){
// load code, works fine
}
 
private void reCalculateScores(Player p) {
boolean found = false;
for (int i = 0; i < highscores.size() && !found; i++) {
Score h = highscores.get(i);
if (h.getPlayername().equals(p.getName())) {
h.setScore(h.getScore() + 1);
found = true;
}
}
 
if (!found) {
Score h = new Score(p, 1);
try {
highscores.add(h);
} catch (UnsupportedOperationException ex) {
this.getLogger().log(Level.WARNING, "The exception is there again ...");
}
}
 
Score[] scores = highscores.toArray(new Score[highscores.size()]);
scores = Tools.selectSortScores(scores);
highscores = Arrays.asList(scores);
saveHighScores();
}
 
}

Sort from tools class:

Code:java

 public static Score[] selectSortScores(Score[] arr) {
for (int i = 0; i < arr.length - 1; i++) {
int iG = i;
for (int j = i + 1; j < arr.length; j++) {
if (arr[j].getScore() > arr[iG].getScore()) iG = j;
}
Score tmp = arr[I];[/I]
[I] arr[I] = arr[iG];[/I][/I]
[I] arr[iG] = tmp;[/I]
[I] }[/I]
[I] return arr;[/I]
[I] }[/I]

highscores.add(h); Keeps throwing the exception, however, for someone that is already in the list it does work. I have no Idea what this problem is.

 

A google search returns that the list returned by this method does not work with the .add() method as it has a fixed size. Try something like highscores.addAll(Arrays.asList(scores));

 

You sir, are awesome! THANKS!