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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A specialized Reader that reads from a file in the file system. All read
requests made by calling me
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Formats and parses dates in a locale-sensitive manner. Formatting turns a Date
into a String, and pa
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ArrayList is an implementation of List, backed by an array. All optional
operations including adding
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
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Factory and utility methods for Executor, ExecutorService,
ScheduledExecutorService, ThreadFactory,
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