You can't iterate over a collection and modify it. You will always get a java.util.ConcurrentModificationException
. First off all you need to use an iterator, to remove the item. Then you can use a second list to store the data you want to add.
Here you are an example:
LinkedList<String> linkedList = new LinkedList<String>();
linkedList.add("This");
linkedList.add("is");
linkedList.add("an");
linkedList.add("test");
LinkedList<String> temp = new LinkedList<String>();
for (Iterator<String> iterator = linkedList.iterator(); iterator.hasNext();) {
String string = (String) iterator.next();
if(string.equals("an")) {
iterator.remove();
temp.add("a");
}
}
linkedList.addAll(temp);
You can call iterator.remove()
to savely remove the current item from list.