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A specialized Writer that writes to a file in the file system. All write
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ArrayList is an implementation of List, backed by an array. All optional
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A Comparator is used to compare two objects to determine their ordering with
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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A task that returns a result and may throw an exception. Implementors define a
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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