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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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Signals a general, I/O-related error. Error details may be specified when
calling the constructor, a
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A Uniform Resource Locator that identifies the location of an Internet resource
as specified by RFC
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A controller for the selection of SelectableChannel objects. Selectable channels
can be registered w
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
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An ExecutorService that executes each submitted task using one of possibly
several pooled threads, n
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