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Wraps either an existing OutputStream or an existing Writerand provides
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A connection to a URL for reading or writing. For HTTP connections, see
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Legacy security code; do not use.
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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A Set is a data structure which does not allow duplicate elements.
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A TimeUnit represents time durations at a given unit of granularity and provides
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