Name
FileReader
Synopsis
FileReader
is a
convenience subclass of InputStreamReader
that is
useful when you want to read
text (as opposed to binary data)
from a file. You create a FileReader
by specifying
the file to be read in any of three possible forms. The
FileReader
constructor internally creates a
FileInputStream
to read bytes from the specified
file and uses the functionality of its superclass,
InputStreamReader
, to convert those bytes from
characters in the local encoding to the
Unicode characters used by Java.
Because FileReader
is a trivial subclass of
InputStreamReader
, it does not define any
read( )
methods or other methods of its own.
Instead, it inherits all its methods from its superclass. If you want
to read Unicode characters from a file that uses some encoding other
than the default encoding for the locale, you must explicitly create
your own InputStreamReader
to perform the
byte-to-character conversion.
Figure 9-19. java.io.FileReader
public class FileReader extends InputStreamReader { // Public Constructors public FileReader(FileDescriptor fd); public FileReader(File file) throws FileNotFoundException; public FileReader(String fileName) throws FileNotFoundException; }
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