Mast be non-negative and less then the size of the collection.

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Mastbenon-negativeandlessthenthesizeofthecollection.Mastbenon-negativeandlessthenthesizeofthecollect

Mast be non-negative and less then the size of the collection.
Mast be non-negative and less then the size of the collection.

Mast be non-negative and less then the size of the collection.
必须是非负数且小于排列的大小.（仅供参考）