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Return the contained value, if present, otherwise throw an exception to be
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An exception that indicates a failed JDBC operation. It provides the following
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HashMap is an implementation of Map. All optional operations are supported.All
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A Map is a data structure consisting of a set of keys and values in which each
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
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Extends the javax.servlet.ServletRequest interface to provide request
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This is the central class in the log4j package. Most logging operations, except
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