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Return the contained value, if present, otherwise throw an exception to be
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A connection represents a link from a Java application to a database. All SQL
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This class contains various methods for manipulating arrays (such as sorting and
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A parser that parses a text string of primitive types and strings with the help
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An int value that may be updated atomically. See the java.util.concurrent.atomic
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Defines methods that all servlets must implement. A servlet is a small Java
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Provides an abstract class to be subclassed to create an HTTP servlet suitable
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