java - save Image as PNG -

i'd save array point chart image(png), java program can show schatter diagram don't know how save it. perhaps imageio.write, , how? can give me advice solve problem. thank you

public class graph extends application {  public void start(stage primarystage) { pane root = new pane(); int[] mydata = {         12, 9, 0, 1, 38, 19, 21, 72, 33, 83, 14, 10, 65, 46, 10, 17, 27, 38, 65, 98, 8, 58, 38, 79, 37, 69, 26, 15};          numberaxis xaxis = new numberaxis(); numberaxis yaxis = new numberaxis(); scatterchart scatterchart=new scatterchart(xaxis,yaxis);   xychart.series data=new xychart.series(); (int i=0; i< mydata.length; i++) {     data.getdata().add(new xychart.data(i,mydata[i])); }         scatterchart.getdata().addall(data);   root.getchildren().add(scatterchart); scene scene = new scene(root, 600, 400);  primarystage.setscene(scene); primarystage.show();  file file = new file("c:\\images\\image.png");  // , ?????  } public static void main(string[] args) { launch(args); } } 

you can draw plots or diagram onto image bufferedimage. save bufferedimage file after that. can try that:

class myscatterplot {     private bufferedimage buf;      //constructors, initializations not shown.      public void savebufferasimage(string pathname){         string fmt = "";         if(!(pathname == null || pathname.equals(""))){             fmt = pathname.substring(pathname.lastindexof(".")+1);             file outputfile = new file(pathname);             try{                 imageio.write(buf, fmt, outputfile);                     }catch(ioexception ioe){system.out.println("unable save file");}         }            }      public void drawimage(){         buf = new bufferedimage (200, 200, bufferedimage.type_int_argb);         graphics2d g2d = buf.creategraphics();            g2d.fillrect(10, 10, 150, 150);  //draw image here (example only)         g2d.dispose();     } } 

to save diagram image file (such .png):

myscatterplot plot = new myscatterplot(); plot.drawimage(); plot.savebufferasimage("mygraph.png");