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Return the contained value, if present, otherwise throw an exception to be
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
descending iterations, next
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A java.util.Queue that additionally supports operations that wait for the queue
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General file manipulation utilities. Facilities are provided in the following
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A generic Abstract Window Toolkit(AWT) container object is a component that can
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