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This class is a character input stream
that uses a byte input stream as its data source. It reads bytes from
a specified InputStream and translates them into
Unicode characters according to a
particular platform- and locale-dependent
character encoding.
This is an important
internationalization feature in
Java 1.1 and later. InputStreamReader supports the
standard Reader methods. It also has a
getEncoding( ) method that returns the name of the encoding
being used to convert bytes to characters.When you create an InputStreamReader, you specify
an InputStream from which the
InputStreamReader is to read bytes and,
optionally, the name of the character encoding used by those bytes.
If you do not specify an encoding name, the
InputStreamReader uses the default encoding for
the default locale, which is usually the correct thing to do. In Java
1.4 and later, this class uses the charset conversion facilities of
the java.nio.charset package and allows you to
explicitly specify the Charset or
CharsetDecoder to be used. Prior to Java 1.4, the
class allows you to specify only the name of the desired charset
encoding.
Figure 9-26. java.io.InputStreamReader
public class InputStreamReader extends Reader {
// Public Constructors
public InputStreamReader (InputStream in );
public InputStreamReader (InputStream in , String charsetName ) throws
UnsupportedEncodingException;
1.4 public InputStreamReader (InputStream in , java.nio.charset.Charset cs );
1.4 public InputStreamReader (InputStream in , java.nio.charset.CharsetDecoder dec );
// Public Instance Methods
public String getEncoding ( );
// Public Methods Overriding Reader
public void close ( ) throws IOException;
public int read ( ) throws IOException;
public int read (char[ ] cbuf , int offset , int length ) throws IOException;
public boolean ready ( ) throws IOException;
}Subclasses
FileReader
