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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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Formats or parses dates and times.This class provides factories for obtaining
instances configured f
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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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A collection designed for holding elements prior to processing. Besides basic
java.util.Collection o
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
#acquire blocks if
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