You must use iterator.remove() instead of tableRecords.remove() You can remove items on a list on which you iterate only if you use the remove method from the iterator. EDIT : When you create an iterator, it starts to count the modifications that were applied on the collection. If the iterator detects that some modifications were … Read more
To avoid the ConcurrentModificationException, you should write your code like this: import java.util.*; public class SomeClass { public static void main(String[] args) { List<String> s = new ArrayList<String>(); for(String a : args) s.add(a); ListIterator<String> it = s.listIterator(); if(it.hasNext()) { String item = it.next(); } System.out.println(s); } } A java.util.ListIterator allows you to modify a list … Read more
I believe this is the purpose behind the Iterator.remove() method, to be able to remove an element from the collection while iterating. For example: Iterator<String> iter = li.iterator(); while(iter.hasNext()){ if(iter.next().equalsIgnoreCase(“str3”)) iter.remove(); }
This is not a synchronization problem. This will occur if the underlying collection that is being iterated over is modified by anything other than the Iterator itself. Iterator it = map.entrySet().iterator(); while (it.hasNext()) { Entry item = it.next(); map.remove(item.getKey()); } This will throw a ConcurrentModificationException when the it.hasNext() is called the second time. The correct … Read more
Here’s why: As it is says in the Javadoc: The iterators returned by this class’s iterator and listIterator methods are fail-fast: if the list is structurally modified at any time after the iterator is created, in any way except through the iterator’s own remove or add methods, the iterator will throw a ConcurrentModificationException. This check … Read more