java.io
Class InputStreamReader

java.lang.Object
  |
  +--java.io.Reader
        |
        +--java.io.InputStreamReader

public class InputStreamReader
extends Reader

An InputStreamReader is a bridge from byte streams to character streams. It reads bytes and translates them into characters according to a specified character encoding. The encoding that it uses may be specified by name, or the platform's default encoding may be accepted.

Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte-input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.

RIM Implementation Note

BlackBerry supports the following character encodings:

Support of other encodings is dependant on the actual device's configuration

The default encoding is "ISO-8859-1".


Field Summary
 
Fields inherited from class java.io.Reader
lock
 
Constructor Summary
InputStreamReader(InputStream is)
          Create an InputStreamReader that uses the default character encoding.
InputStreamReader(InputStream is, String enc)
          Create an InputStreamReader that uses the named character encoding.
 
Method Summary
 void close()
          Close the stream.
 void mark(int readAheadLimit)
          Mark the present position in the stream.
 boolean markSupported()
          Tell whether this stream supports the mark() operation.
 int read()
          Read a single character.
 int read(char[] cbuf, int off, int len)
          Read characters into a portion of an array.
 boolean ready()
          Tell whether this stream is ready to be read.
 void reset()
          Reset the stream.
 long skip(long n)
          Skip characters.
 
Methods inherited from class java.io.Reader
read
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

InputStreamReader

public InputStreamReader(InputStream is)
Create an InputStreamReader that uses the default character encoding.
Parameters:
in - An InputStream

InputStreamReader

public InputStreamReader(InputStream is,
                         String enc)
                  throws UnsupportedEncodingException
Create an InputStreamReader that uses the named character encoding.
Parameters:
in - An InputStream
enc - The name of a supported
Throws:
UnsupportedEncodingException - If the named encoding is not supported
Method Detail

close

public void close()
           throws IOException
Close the stream.
Overrides:
close in class Reader
Throws:
IOException - If an I/O error occurs

mark

public void mark(int readAheadLimit)
          throws IOException
Mark the present position in the stream.
Overrides:
mark in class Reader
Throws:
IOException - If an I/O error occurs

markSupported

public boolean markSupported()
Tell whether this stream supports the mark() operation.
Overrides:
markSupported in class Reader

Following copied from class: Reader
Returns:
true if and only if this stream supports the mark operation.

read

public int read()
         throws IOException
Read a single character.
Overrides:
read in class Reader
Throws:
IOException - If an I/O error occurs

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException
Read characters into a portion of an array.
Overrides:
read in class Reader
Throws:
IOException - If an I/O error occurs

ready

public boolean ready()
              throws IOException
Tell whether this stream is ready to be read.
Overrides:
ready in class Reader
Throws:
IOException - If an I/O error occurs

reset

public void reset()
           throws IOException
Reset the stream.
Overrides:
reset in class Reader
Throws:
IOException - If an I/O error occurs

skip

public long skip(long n)
          throws IOException
Skip characters.
Overrides:
skip in class Reader
Throws:
IOException - If an I/O error occurs



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