question: public static String readLine ( InputStream in , String charset ) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream ( ) ; while ( true ) { int b = in . read ( ) ; if ( b == - 1 ) { if ( baos . size ( ) == 0 ) { return null ; } else { break ; } } if ( b == '\n' ) { break ; } if ( b != '\r' ) { baos . write ( b ) ; continue ; } int b2 = in . read ( ) ; if ( b2 == - 1 ) { baos . write ( b ) ; break ; } if ( b2 == '\n' ) { break ; } baos . write ( b ) ; baos . write ( b2 ) ; } return baos . toString ( charset ) ; }
target:  Read a line from the given stream.