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https://issues.apache.org/jira/browse/PDFBOX-4664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16948250#comment-16948250
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Maruan Sahyoun commented on PDFBOX-4664:
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[~lehmi] thanks - I'll start fixing the issues with adding/removing first and 
as that works add the Iterator/ListIterator.

> Iterator.remove() does not work in COSArrayList
> -----------------------------------------------
>
>                 Key: PDFBOX-4664
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4664
>             Project: PDFBox
>          Issue Type: Bug
>    Affects Versions: 2.0.17
>            Reporter: Zhichao Yang
>            Assignee: Andreas Lehmkühler
>            Priority: Minor
>
> {code:java}
> for (Iterator itr = pdfPage.getAnnotations().iterator(); itr.hasNext(); ) {
>                     itr.remove();
>  }
> {code}
> This is not working on annotations list because cosArrayList.iterator() is 
> cosArrayList.actual.iterator(), but when convert to a COSArray it uses 
> cosArrayList.array, which is not affected by iterator.remove(). A iterator to 
> sync the actual and the array would be nice.



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