How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it? [duplicate]

Answer 1

One alternative method is convert your List to array, iterate them and remove them directly from the List based on your logic.

List myList = new ArrayList(); // You can use either list or set

myList.add("abc");
myList.add("abcd");
myList.add("abcde");
myList.add("abcdef");
myList.add("abcdefg");

Object[] obj = myList.toArray();

for(Object o:obj)  {
    if(condition)
        myList.remove(o.toString());
}