Saving a .gif or .jpg image

Question

hello,
in the code sample below you can see how I try to make a "thumbnail"-like image of a gif, jpg.
Afterwards they are showed in a JTable.
But this takes quite a lot of time to show the, because they all needs to be resized on the fly each time.
Can I opent he picture, resize it, save it as another one, and use this new file to show as a thumbnail?
code:
     //setIcon
     //Zet de foto in de picPanel
     public void setIcon(File file){
          try{
               FileReader test = new FileReader(file);
               image = file;
               test.close();
               ImageIcon icon = new ImageIcon (image.getPath());
               if (icon.getIconWidth() > icon.getIconHeight())
                    icon.setImage(icon.getImage().getScaledInstance(150,-1,Image.SCALE_FAST));
               else
                    icon.setImage(icon.getImage().getScaledInstance(-1,150,Image.SCALE_FAST));
               foto.setIcon(icon);
          catch(Exception e){
               Image = new File("img/wrong.gif");
               ImageIcon icon = new ImageIcon (image.getPath());
               if (icon.getIconWidth() > icon.getIconHeight())
                    icon.setImage(icon.getImage().getScaledInstance(150,-1,Image.SCALE_FAST));
               else
                    icon.setImage(icon.getImage().getScaledInstance(-1,150,Image.SCALE_FAST));
               foto.setIcon(icon);
          changed();
     }

Answer 1

found an method saveComponentAsImage in one of the topics, and changed it a bit, so ti would be usefull in my current project.
//saveIconAsImage
    //slaat de gegeven icon op met gegeven max lengte/breedte
    public static void saveIconAsImage(ImageIcon icon, String name,int width) {
          if (icon.getIconWidth() > icon.getIconHeight())
                         icon.setImage(icon.getImage().getScaledInstance(width,-1,Image.SCALE_REPLICATE));
          else
                         icon.setImage(icon.getImage().getScaledInstance(-1,width,Image.SCALE_REPLICATE));          
          JLabel c = new JLabel(icon);               
        int w = c.getPreferredSize().width;
        int h = c.getPreferredSize().height;
        // use TYPE_INT_ARGB if you want alpha (transparency)
        BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        // don't do this if you want ugly graphics ;)
        HashMap hints = new HashMap();
        hints.put(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        hints.put(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
        Graphics g = image.getGraphics();
        ((Graphics2D)g).addRenderingHints(hints);
        // make the component believe its visible and do its layout
        c.addNotify();
        c.setSize(w,h);
        c.setVisible(true);
        c.validate();
        // draw the graphics
        c.print(g);
        // write it out
        try {
            ImageIO.write(image, "jpg", new File("pic/"+name+"_"+width+".jpg"));
        } catch (IOException ioe) {
            System.out.println(ioe.getMessage());
        // cleanup
        g.dispose();
    }