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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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An immutable arbitrary-precision signed decimal.A value is represented by an
arbitrary-precision "un
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Calendar is an abstract base class for converting between a Date object and a
set of integer fields
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Factory and utility methods for Executor, ExecutorService,
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Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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