Java Arrays, Collections, Sets and Maps fit into the category of  xx objects?
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Is it fair to group the following:

    Arrays, Collections, Sets, Maps

into a group called Collections or is there another single word or two words (other than object) that best describes Arrays, Collections, Sets and Maps.

Sorry if this is not the right category or not a suitable question. I am learning about these topics and need to find a single word that best describes all of these. 