从CopyOnWriteArrayList中删除元素 [英] remove elements from CopyOnWriteArrayList
问题描述
当我尝试使用迭代器从CopyOnWriteArrayList中删除元素时,我收到异常。
我注意到它已被记录
I am getting an exception when I try to remove elements from CopyOnWriteArrayList using an iterator. I have noticed that it is documented
迭代器本身的元素更改操作(删除,设置和添加)不是支持的。这些方法抛出UnsupportedOperationException。
Element-changing operations on iterators themselves (remove, set, and add) are not supported. These methods throw UnsupportedOperationException.
(来自http://download.oracle.com/javase/6/docs/api/java/util/concurrent/CopyOnWriteArrayList.html )
现在,令人惊讶的是我可以使用foreach迭代它并使用remove()函数。但后来我得到了着名的错误 - 当尝试使用for循环从列表中删除项目时 - 跳过被删除元素旁边的元素。
有什么建议吗?
Now, surprisingly i can iterate it with foreach and use the remove() function . But then I get the famous bug - when trying to remove an item from a list using a for loop - you skip the element next to the removed element. any suggestions then?
推荐答案
迭代集合,选择要删除的所有元素并将其放入临时集合中。完成迭代后,使用方法removeAll从原始集合中删除所有找到的元素。
Iterate over the collection choosing all the elements you want to delete and putting those in a temporary collection. After you finish iteration remove all found elements from the original collection using method removeAll.
这对您有用吗?我的意思是,不确定删除逻辑是否比算法中的更复杂。
Would that work out for you? I mean, not sure if deletion logic is more complicated than that in your algorithm.
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