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A readable source of bytes.Most clients will use input streams that read data
from the file system (
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A class for turning a byte stream into a character stream. Data read from the
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A legacy iteration interface.New code should use Iterator instead. Iterator
replaces the enumeration
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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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An ordered collection (also known as a sequence). The user of this interface has
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