public InputStreamReader(InputStream in){
  super(in);
  try {
    sd=StreamDecoder.forInputStreamReader(in,this,(String)null);
  }
 catch (  UnsupportedEncodingException e) {
    throw new Error(e);
  }
}

public InputStreamReader ( InputStream in ) { super ( in ) ; try { sd = StreamDecoder . forInputStreamReader ( in , this , ( String ) null ) ; } catch ( UnsupportedEncodingException e ) { throw new Error ( e ) ; } }
creates an inputstreamreader that uses the default charset .
