ImageIO, BufferedImage and PNG

Question

Hello,
I have a BufferedImage object, and I would like to copied it to the clipboard as a PNG image. What I have now is a code that copy the BufferedImage to the clipboard.
What's the best way to convert the BufferedImage to PNG? There is ImageIO.write() but I would prefer to not create a file on the disk for this task.
Is it possible to create file in memory? or is it possible to convert the image in memory?
Thanks in advance for your help.

Answer 1

Thanks all for your answers.
I found one possibility : an array of byte can be converted to an Image with a call to Toolkit.getDefaultToolkit().createImage()
So the code looks like this:
BufferedImage img = /* some code to get the img */;
ByteArrayOutputStream byteoutarray = new ByteArrayOutputStream();
ImageIO.write(img, "png", byteoutarray);
PngSelection trans = new PngSelection(byteoutarray.toByteArray());
Clipboard clipboard = getToolkit().getSystemClipboard();
clipboard.setContents(trans, null);where PngSelection is defined like this:
public static class PngSelection
   implements Transferable
   private byte[] data;
   public PngSelection(byte[] data) {
     this.data = data;
   public DataFlavor[] getTransferDataFlavors()
     return new DataFlavor[] {DataFlavor.imageFlavor};
   public boolean isDataFlavorSupported(DataFlavor flavor)
     return DataFlavor.imageFlavor.equals(flavor);
   public Object getTransferData(DataFlavor flavor)
     throws UnsupportedFlavorException,IOException
     if (!DataFlavor.imageFlavor.equals(flavor))
       throw new UnsupportedFlavorException(flavor);
     return Toolkit.getDefaultToolkit().createImage(data);
  }I need to test all this but it seems to works. Thanks again.