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Return the contained value, if present, otherwise throw an exception to be
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Signals a general, I/O-related error. Error details may be specified when
calling the constructor, a
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This class represents a server-side socket that waits for incoming client
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A linear collection that supports element insertion and removal at both ends.
The name deque is shor
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This class provides methods that return pseudo-random values.It is dangerous to
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A point representing a location in (x,y) coordinate space, specified in integer
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