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Provides access to system-related information and resources including standard
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Provides a client-side TCP socket.
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Thrown when a hostname can not be resolved.
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A Set is a data structure which does not allow duplicate elements.
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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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