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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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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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A parser that parses a text string of primitive types and strings with the help
of regular expressio
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Factory and utility methods for Executor, ExecutorService,
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Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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This is the main interface of a Quartz Scheduler. A Scheduler maintains a registry of org.quartz.Job
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