question: public boolean isNullStrokeFill ( boolean isRectangle ) { MetaPen pen = state . getCurrentPen ( ) ; MetaBrush brush = state . getCurrentBrush ( ) ; boolean noPen = pen . getStyle ( ) == MetaPen . PS_NULL ; int style = brush . getStyle ( ) ; boolean isBrush = style == MetaBrush . BS_SOLID || style == MetaBrush . BS_HATCHED && state . getBackgroundMode ( ) == MetaState . OPAQUE ; boolean result = noPen && ! isBrush ; if ( ! noPen ) { if ( isRectangle ) state . setLineJoinRectangle ( cb ) ; else state . setLineJoinPolygon ( cb ) ; } return result ; }
target:  Return true if the pen style is null and if it isn't a brush.