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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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ObjectMapper provides functionality for reading and writing JSON, either to and
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Allows reading from and writing to a file in a random-access manner. This is
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The TimerTask class represents a task to run at a specified time. The task may
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General file manipulation utilities. Facilities are provided in the following
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Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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