java.util.ConcurrentModificationException problem

Question

On this code I get an java.util.ConcurrentModificationException the method is in a webservice and first reads the file and checks if the vakNaam is in the file. Then it will be

Answer 1

The error is in this part:

for (String s : tempFile){
    String [] splitted = s.split(" ");
    if (splitted[0].equals(naam)){
        tempFile.remove(s);
        found = true;   
    }
} 

Don't modify the list you are iterating over. You could solve this by using the Iterator explicitely:

for (Iterator it = tempFile.iterator(); it.hasNext();) {
    String s = it.next();
    String [] splitted = s.split(" ");
    if (splitted[0].equals(naam)){
        it.remove();
        found = true;   
    }
}