question: @ Override public int read ( char [ ] cbuf , int off , int len ) throws IOException { int i = 0 ; InputStream is = _is ; if ( is == null ) return - 1 ; for ( i = 0 ; i < len ; i ++ ) { if ( i > 0 && is . available ( ) < 1 ) return i ; int ch = read ( ) ; if ( ch < 0 ) return i == 0 ? - 1 : i ; cbuf [ off + i ] = ( char ) ch ; } return i ; }
target:  Reads into a character buffer using the correct encoding.