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Class java.io.InputStreamReader 

java.lang.Object
   |
   +----java.io.Reader
           |
           +----java.io.InputStreamReader
public class InputStreamReader
extends Reader
super class of:
FileReader
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. For top efficiency, consider wrapping an InputStreamReader within a BufferedReader; for example, 

 BufferedReader in
   = new BufferedReader(new InputStreamReader(System.in));

Since:
JDK1.1
See Also:
BufferedReader, InputStream

Constructor Index

o InputStreamReader(InputStream)
Create an InputStreamReader that uses the default character encoding.
o InputStreamReader(InputStream, String)
Create an InputStreamReader that uses the named character encoding.

Method Index

o close()
Close the stream.
o getEncoding()
Return the name of the encoding being used by this stream.
o read()
Read a single character.
o read(char[], int, int)
Read characters into a portion of an array.
o ready()
Tell whether this stream is ready to be read.

Constructors

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

Parameters:
in - An InputStream
o InputStreamReader 
 public InputStreamReader(InputStream in,
                          String enc) throws UnsupportedEncodingException
Create an InputStreamReader that uses the named character encoding.

Parameters:
in - An InputStream
enc - Name of encoding to be used
Throws: UnsupportedEncodingException
If the named encoding is not supported

Methods

o getEncoding 
 public String getEncoding()
Return the name of the encoding being used by this stream. May return null if the stream has been closed.

o read 
 public int read() throws IOException
Read a single character.

Returns:
The character read, or -1 if the end of the stream has been reached
Throws: IOException
If an I/O error occurs
Overrides:
read in class Reader
o read 
 public int read(char cbuf[],
                 int off,
                 int len) throws IOException
Read characters into a portion of an array.

Parameters:
cbuf - Destination buffer
off - Offset at which to start storing characters
len - Maximum number of characters to read
Returns:
The number of characters read, or -1 if the end of the stream has been reached
Throws: IOException
If an I/O error occurs
Overrides:
read in class Reader
o ready 
 public boolean ready() throws IOException
Tell whether this stream is ready to be read. An InputStreamReader is ready if its input buffer is not empty, or if bytes are available to be read from the underlying byte stream.

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

Throws: IOException
If an I/O error occurs
Overrides:
close in class Reader 
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