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A readable source of bytes.Most clients will use input streams that read data
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Uses a one-way hash function to turn an arbitrary number of bytes into a
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A Comparator is used to compare two objects to determine their ordering with
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
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A point representing a location in (x,y) coordinate space, specified in integer
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