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Return the contained value, if present, otherwise throw an exception to be
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A java.util.Queue that additionally supports operations that wait for the queue
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A TimeUnit represents time durations at a given unit of granularity and provides
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Patterns are compiled regular expressions. In many cases, convenience methods
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XPath provides access to the XPath evaluation environment and expressions.
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The GridLayout class is a layout manager that lays out a container's components
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A filter is an object that performs filtering tasks on either the request to a
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