aps aps - 2 months ago 16
Java Question

How to modify a Collection while iterating using for-each loop without ConcurrentModificationException?

If I modify a Collection while iterating over it using for-each loop, it gives

ConcurrentModificationException
. Is there any workaround?

mre mre
Answer

Use Iterator#remove.

This is the only safe way to modify a collection during iteration. For more information, see The Collection Interface tutorial.

If you also need the ability to add elements while iterating, use a ListIterator.

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