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The abstract base class for all number formats. This class provides the
interface for formatting and
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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Doubly-linked list implementation of the List and Dequeinterfaces. Implements
all optional list oper
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This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
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A Set is a data structure which does not allow duplicate elements.
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