InputStreamReader

InputStreamReader

java.io

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Java 1.1

readable closeable

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