收集方法是Java中的原子操作吗？

Question

考虑下面的方法{{CD1}}：

addAll(Collection<? extends T> collection)
addAll(int i, Collection<? extends T> collection)
removeAll(Collection<?> collection)
retainAll(Collection<?> collection)

我想知道这些方法是否真的是原子操作

Atomic implies indivisibility and irreducibility, so an atomic operation must be performed entirely or not performed at all.