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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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This class represents a server-side socket that waits for incoming client
connections. A ServerSocke
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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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A specific moment in time, with millisecond precision. Values typically come
from System#currentTime
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An interface for the creation of Connection objects which represent a connection
to a database. This
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