public class InputStreamReader extends Reader
Known Direct Subclasses

An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset 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.

For top efficiency, consider wrapping an InputStreamReader within a BufferedReader. For example:

 BufferedReader in
   = new BufferedReader(new InputStreamReader(;

Inherited Field Summary

Public Constructor Summary

InputStreamReader(InputStream in)
Creates an InputStreamReader that uses the default charset.
InputStreamReader(InputStream in, String charsetName)
Creates an InputStreamReader that uses the named charset.
InputStreamReader(InputStream in, Charset cs)
Creates an InputStreamReader that uses the given charset.
InputStreamReader(InputStream in, CharsetDecoder dec)
Creates an InputStreamReader that uses the given charset decoder.

Public Method Summary

Closes the stream and releases any system resources associated with it.
Returns the name of the character encoding being used by this stream.
Reads a single character.
read(char[] cbuf, int offset, int length)
Reads characters into a portion of an array.
Tells whether this stream is ready to be read.

Inherited Method Summary