question: @ Override protected void deviceDrawLine ( int xBegin , int yBegin , int xEnd , int yEnd , Color color ) { Stroke stroke = getStroke ( ) ; if ( stroke instanceof BasicStroke ) { BasicStroke lineStroke = ( BasicStroke ) stroke ; if ( lineStroke . getDashArray ( ) != null ) { draw ( new Line2D . Float ( xBegin , yBegin , xEnd , yEnd ) ) ; return ; } float lineWidth = lineStroke . getLineWidth ( ) ; Point2D . Float penSize = new Point2D . Float ( lineWidth , lineWidth ) ; AffineTransform deviceTransform = getTransform ( ) ; deviceTransform . deltaTransform ( penSize , penSize ) ; float deviceLineWidth = Math . min ( Math . abs ( penSize . x ) , Math . abs ( penSize . y ) ) ; Point2D . Float begin_pos = new Point2D . Float ( xBegin , yBegin ) ; deviceTransform . transform ( begin_pos , begin_pos ) ; Point2D . Float end_pos = new Point2D . Float ( xEnd , yEnd ) ; deviceTransform . transform ( end_pos , end_pos ) ; int endCap = lineStroke . getEndCap ( ) ; int lineJoin = lineStroke . getLineJoin ( ) ; if ( ( end_pos . getX ( ) == begin_pos . getX ( ) ) && ( end_pos . getY ( ) == begin_pos . getY ( ) ) ) { endCap = BasicStroke . CAP_ROUND ; } WPrinterJob wPrinterJob = ( WPrinterJob ) getPrinterJob ( ) ; if ( wPrinterJob . selectStylePen ( endCap , lineJoin , deviceLineWidth , color ) ) { wPrinterJob . moveTo ( ( float ) begin_pos . getX ( ) , ( float ) begin_pos . getY ( ) ) ; wPrinterJob . lineTo ( ( float ) end_pos . getX ( ) , ( float ) end_pos . getY ( ) ) ; } else { double lowerRes = Math . min ( wPrinterJob . getXRes ( ) , wPrinterJob . getYRes ( ) ) ; if ( ( endCap == BasicStroke . CAP_ROUND ) || ( ( ( xBegin == xEnd ) || ( yBegin == yEnd ) ) && ( deviceLineWidth / lowerRes < MAX_THINLINE_INCHES ) ) ) { wPrinterJob . selectPen ( deviceLineWidth , color ) ; wPrinterJob . moveTo ( ( float ) begin_pos . getX ( ) , ( float ) begin_pos . getY ( ) ) ; wPrinterJob . lineTo ( ( float ) end_pos . getX ( ) , ( float ) end_pos . getY ( ) ) ; } else { draw ( new Line2D . Float ( xBegin , yBegin , xEnd , yEnd ) ) ; } } } }
target:  Draw a line using a pen created using the specified color and current stroke properties.