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An output stream that writes bytes to a file. If the output file exists, it can
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This class contains various methods for manipulating arrays (such as sorting and
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Note: Do not use this class since it is obsolete. Please use the Map interface
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An ordered collection (also known as a sequence). The user of this interface has
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This class provides methods that return pseudo-random values.It is dangerous to
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A filter is an object that performs filtering tasks on either the request to a
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