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. 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.

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

InputStreamReader(InputStream in)
Create an InputStreamReader that uses the default character encoding.

InputStreamReader(InputStream in, 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(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.

Methods inherited from class java.io.Reader

read, read, skip

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InputStreamReader

public InputStreamReader(InputStream in)

Create an InputStreamReader that uses the default character encoding.

InputStreamReader

public InputStreamReader(InputStream in,
                         String enc)
                  throws UnsupportedEncodingException

Create an InputStreamReader that uses the named character encoding.

Throws:

UnsupportedEncodingException

Method Detail

close

public void close()
           throws IOException

Close the stream. Closing a previously closed stream has no effect.

Specified by:

close in class Reader

Throws:

IOException

mark

public void mark(int readAheadLimit)
          throws IOException

Mark the present position in the stream.

Overrides:

mark in class Reader

Throws:

IOException

markSupported

public boolean markSupported()

Tell whether this stream supports the mark() operation.

Overrides:

markSupported in class Reader

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException

Read characters into a portion of an array.

Specified by:

read in class Reader

Throws:

IOException

ready

public boolean ready()
              throws IOException

Tell whether this stream is ready to be read.

Overrides:

ready in class Reader

Throws:

IOException

reset

public void reset()
           throws IOException

Reset the stream.

Overrides:

reset in class Reader

Throws:

IOException