Interacting with Filesystems - Beginning Java 7 - page 770

Thefollowingexampleusesthesecondconstructortocreateabridgetoanunderlying
file input stream so that Polish text can be read from an ISO/IEC 8859-2-encoded file.
FileInputStream fis = new FileInputStream("polish.txt");
InputStreamReader

isr = new InputStreamReader(fis,

"8859_2");
char ch = isr.read(ch);
Note OutputStreamWriter and InputStreamReader declare a String
getEncoding() method that returns the name of the character encoding in use.
Whentheencodinghasahistoricalname,thatnameisreturned;otherwise,theencod-
ing's canonical name is returned.

FileWriter and FileReader

FileWriter is a convenience class for writing characters to files. It subclasses
OutputStreamWriter , and its constructors call Out-
putStreamWriter(OutputStream) .Aninstanceofthisclassisequivalenttothe
following code fragment:
FileOutputStream fos = new FileOutputStream(pathname);
OutputStreamWriter osw;
osw = new OutputStreamWriter(fos, Sys-

tem.getProperty("file.encoding"));
In Chapter3 , Ipresentedalogginglibrarywitha File class( Listing3-20 )thatdidn't
incorporate file-writing code. Listing 8-19 addresses this situation by presenting a re-
vised File class that uses FileWriter to log messages to a file.

Listing 8-19. Logging messages to an actual file

package logging;

import java.io.FileWriter;
import java.io.IOException;

class File implements Logger
{

private final static String LINE_SEPARATOR =
System.getProperty("line.separator");
private String dstName;