The OutputStreamWriter Class
java.io.Writer
is an abstract class. Its most basic
concrete subclass is
OutputStreamWriter
:
public class OutputStreamWriter extends Writer
Its constructor connects a character writer to an underlying output stream:
public OutputStreamWriter(OutputStream out) public OutputStreamWriter(OutputStream out, String encoding) throws UnsupportedEncodingException
The first constructor assumes that the text in the stream is to be
written using the platform’s default encoding. The second
constructor specifies an encoding. There’s no easy way to
determine which encodings are supported, but the ones listed in Table 2.4 in Appendix B, are supported
by most VMs. For example, this code attaches an
OutputStreamWriter
to
System.out
with the default encoding:
OutputStreamWriter osw = new OutputStreamWriter(System.out);
The default encoding is normally ISO Latin-1, except on Macs, where
it is MacRoman. Whatever it is, you can find it in the system
property file.encoding
:
String defaultEncoding = System.getProperty("file.encoding");
On the other hand, if you want to write a file encoded in ISO 8859-7 (ASCII plus Greek) you might do this:
FileOutputStream fos = new FileOutputStream("greek.txt"); OutputStreamWriter greekWriter = new OutputStreamWriter(fos, "8859_7");
The write()
methods convert characters to bytes
according to a specified character encoding and write those bytes
onto the underlying output stream:
public void write(int c) throws IOException public void write(char[] ...
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