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A Comparator is used to compare two objects to determine their ordering with
respect to each other.
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An iterator over a sequence of objects, such as a collection.If a collection has
been changed since
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TreeSet is an implementation of SortedSet. All optional operations (adding and
removing) are support
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Vector is an implementation of List, backed by an array and synchronized. All
optional operations in
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This class provides access to implementations of cryptographic ciphers for
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