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An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
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A thread is a thread of execution in a program. The Java Virtual Machine allows
an application to ha
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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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Legacy security code; do not use.
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ArrayList is an implementation of List, backed by an array. All optional
operations including adding
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Is the value null?
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