Class InputStreamReader

java.lang.Object

java.io.Reader

java.io.InputStreamReader

All Implemented Interfaces:

Closeable, AutoCloseable

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. Since: CLDC 1.0 See Also:Reader, UnsupportedEncodingException

Field Summary

Fields inherited from class Reader

lock

Constructor Summary

Constructors

Constructor	Description
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.
InputStreamReader(InputStream is, Charset cs)	An InputStreamReader that decodes with cs.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the stream.
String	getEncoding()	The historical name of the encoding: UTF8, ASCII, ISO8859_1.
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 Reader

read, transferTo

Methods inherited from class Object

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

Constructor Details

InputStreamReader

public InputStreamReader(InputStream is)

Create an InputStreamReader that uses the default character encoding. is - An InputStream

InputStreamReader

public InputStreamReader(InputStream is,
 String enc)
                  throws UnsupportedEncodingException

Create an InputStreamReader that uses the named character encoding. is - An InputStreamenc - The name of a supported character encoding

• If the named encoding is not supported

Throws:

UnsupportedEncodingException

InputStreamReader

public InputStreamReader(InputStream is,
 Charset cs)

An InputStreamReader that decodes with cs.

Method Details

close

public void close()
           throws IOException

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

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

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()
         throws IOException

Read a single character.

Overrides:

read in class Reader

Throws:

IOException

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

skip

public long skip(long n)
          throws IOException

Skip characters.

Overrides:

skip in class Reader

Throws:

IOException

getEncoding

public String getEncoding()

The historical name of the encoding: UTF8, ASCII, ISO8859_1.