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Return the contained value, if present, otherwise throw an exception to be
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Wraps either an existing OutputStream or an existing Writerand provides
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A ConnectException is thrown if a connection cannot be established to a remote
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This exception is thrown when a timeout expired on a socket read or accept
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A PriorityQueue holds elements on a priority heap, which orders the elements
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An int value that may be updated atomically. See the java.util.concurrent.atomic
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