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Return the contained value, if present, otherwise throw an exception to be
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An output stream that writes bytes to a file. If the output file exists, it can
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A readable source of bytes.Most clients will use input streams that read data
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An immutable arbitrary-precision signed decimal.A value is represented by an
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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Factory and utility methods for Executor, ExecutorService,
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