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A connection represents a link from a Java application to a database. All SQL
statements and results
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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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A legacy iteration interface.New code should use Iterator instead. Iterator
replaces the enumeration
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An int value that may be updated atomically. See the java.util.concurrent.atomic
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Defines a general exception a servlet can throw when it encounters difficulty.
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