[Solved] java+ ConcurrentModificationException forEach(enhanced) loop single thread [duplicate]

Question

You are not permitted to mutate a list while you are iterating over it. Your l.remove(j) causes the list l to change, but you’re inside a for (Integer j : l) loop.

Accepted Answer

You are not permitted to mutate a list while you are iterating over it. Your l.remove(j) causes the list l to change, but you’re inside a for (Integer j : l) loop.