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A specialized Writer that writes to a file in the file system. All write
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A readable source of bytes.Most clients will use input streams that read data
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This class represents a server-side socket that waits for incoming client
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An iterator over a sequence of objects, such as a collection.If a collection has
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A Map is a data structure consisting of a set of keys and values in which each
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A parser that parses a text string of primitive types and strings with the help
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