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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 connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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An ExecutorService that executes each submitted task using one of possibly
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