How to load an image from local filesystem, and paint it to a frame

Please offer an AWT solution

Image getImage
    String path
    Image image = Toolkit.createImage(path);
    loadImage(image);
    return image;
void loadImage
    MediaTracker mt = new MediaTracker(image_observer);
    mt.addImage(image, 0);
    try
        mt.waitForID(0);
    catch interrupted exception
class extends Panel
    Image image
    public void paint(
        g.drawImage(image,
    public void update(
        paint(g);
    public Dimension getPreferedSize
        return size of image

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How to load an image from local disk?

Hi!
I have spent hours on the net searching for an example, that
could
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file (picture) and then show this picture in the browser (so
the source of some existing picture would change).
I found only multiple solutions on how to upload a picture,
but
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I tried programming it alone, but the FileReference class has
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Thank you very very much
Gus

OK, I tried without FileReference, simply by changing String
variable of the source path when calling image.load(path), but it
works ONLY FOR REMOTE pictures (online), I also tried with
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[Embed(source="C:/somePicture.jpg")]
public var _img0:Class;
, but it appears that you CANNOT CHANGE THE PATH DOURING
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How to Snap/Grab Image from 1394 camera and display the Image in CWIMAQVIEWER in VC++ ?

Hi,
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I do not know if this is even possible.
At the moment, to load an image inside an Html page you need to use the <img src=""> tag. and in the src you put the path of the image. Now I would like to save an image inside the database.
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Hi Lily, and welcome to Apple Discussions.
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While it is true that technology waits for no man; stupidity will always stop to take on new passengers.

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I'm loading an image from the CameraRoll using this method http://www.flashandmath.com/mobile/cameraroll/
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2) The number of images on the camera roll (approx 60 on iPad vs almost 900 on the phone)
Has anyone else noticed such a difference in speed between devices / number of files ?
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How to load mutiple image

I'm trying to create a photo manager but I can't find a way to load multiple images onto my frame. I have a thumbnail class that makes thumbnails for an image (which is a modified version of the class ImageHolder from FilthyRichClient)
public class Thumbnails {
 private List<BufferedImage> scaledImages = new ArrayList<BufferedImage>();
private static final int AVG_SIZE = 160;
* Given any image, this constructor creates and stores down-scaled
* versions of this image down to some MIN_SIZE
public Thumbnails(File imageFile) throws IOException{
 // TODO Auto-generated constructor stub
 BufferedImage originalImage = ImageIO.read(imageFile);
int imageW = originalImage.getWidth();
int imageH = originalImage.getHeight();
boolean firstScale = true;
scaledImages.add(originalImage);
while (imageW >= AVG_SIZE && imageH >= AVG_SIZE) {
 if(firstScale && (imageW > 320 || imageH > 320)) {
 float factor = (float) imageW / imageH;
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 else {
 imageH = 320;
 imageW = (int) (factor * imageH);
 else {
 imageW >>= 1;
 imageH >>= 1;
BufferedImage scaledImage = new BufferedImage(imageW, imageH,
originalImage.getType());
Graphics2D g2d = scaledImage.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.drawImage(originalImage, 0, 0, imageW, imageH, null);
g2d.dispose();
scaledImages.add(scaledImage);
* This method returns an image with the specified width. It finds
* the pre-scaled size with the closest/larger width and scales
* down from it, to provide a fast and high-quality scaled version
* at the requested size.
BufferedImage getImage(int width) {
for (BufferedImage scaledImage : scaledImages) {
int scaledW = scaledImage.getWidth();
// This is the one to scale from if:
// - the requested size is larger than this size
// - the requested size is between this size and
// the next size down
// - this is the smallest (last) size
if (scaledW < width || ((scaledW >> 1) < width) ||
(scaledW >> 1) < (AVG_SIZE >> 1)) {
if (scaledW != width) {
// Create new version scaled to this width
// Set the width at this width, scale the
// height proportional to the image width
float scaleFactor = (float)width / scaledW;
int scaledH = (int)(scaledImage.getHeight() *
scaleFactor + .5f);
BufferedImage image = new BufferedImage(width,
scaledH, scaledImage.getType());
Graphics2D g2d = image.createGraphics();
g2d.setRenderingHint(
RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.drawImage(scaledImage, 0, 0,
width, scaledH, null);
g2d.dispose();
scaledImage = image;
return scaledImage;
// shouldn't get here
return null;
A loop will loop through a collection of files and pass them to the constructor of Thumbnails to create thumbnails and then set them as icon for JLabels that will be added to a JPanel, but it throws a java.lang.OutOfMemoryError at this line:
BufferedImage originalImage = ImageIO.read(imageFile);
even when there're only about 8 image files in the collection (total size 2,51MB).
I've seen other people's software that could load hundreds of photos in a matter of seconds! How do I suppose to do that? How to load mutiple images efficiently? Please help!! Thanks a lot!

another_beginner wrote:
Thanks everybody! I appreciate your help! I don't understand why but when I use a separate thread to do the job, that problem disappear. You were likely doing your image loading and thumnail creation on the Event Dispatching Thread. Among other things, this is the same thread that updates and paints your panels, frames, buttons, ect.. When a programer does something computationaly expensive on the event dispatching thread then the GUI becomes unresponsive until the computation is done.
Ideally what you want to do is load images and create thumnails on a seperate thread and update your GUI on the event dispatching thread. I supect that while you are finally doing the first item, you might now be violating the second item.
Whatever, the program seems to be pretty slow on start up 'cause it have to reload images everytime. I'm using Picasa and it can display those thumbnails almost instantly. I know that program is made by professionals. But I still want to know how.I took a look at this Picasa you mentioned. It's the photo manager from google right? You're right in that the thumnails display instantly when starting up. This is because Picasa is actually saving the thumnails, instead of creating them everytime the program starts up. It only creates the thumnails once (when you import a picture) and saves the thumnail data to " +*currentUser*+ /AppData/Local/Google/Picasa2/db3/" (at least on my computer --> Vista).
Also, if your looking for speed then for some inexplicable reason java.awt.Toolkit.getDefaultToolkit().createImage(...); is faster (sometimes much faster) than ImageIO.read(...). But there comes a price in dealing with Toolkit images. A toolkit image isn't ready for anything until it has been properly 'loaded' using one of several methods. Also, when you're done and ready for the image to be garbage collected then you need to call Image.flush() or you will eventually find yourself with an out of memory error (BufferedImages don't have this problem). Lastly, Toolkit.createImage(...) can only read image files that the older versions of java supported (jpg, png, gif, bmp) .
And, another question (or maybe I should post it in a different thread?), I can't display all thumbnails using a JPanel because it has a constant height unless I explicitly set it with setPreferredSize. Even when put in a JScrollPane, the height doesn't change so the scrollbar doesn't appear. Anyone know how to auto grow or shrink a JPanel vertically? Or I have to calculate the preferred height by myself?Are you drawing the thumnails directly on the JPanel? If so then you will indeed need to dynamically set the preferred size of the component.
If not, then presumebly your wrapping the thumnails in something like a JLabel or JButton and adding that to the panel. If so, what is the layout manager you're using for the panel?

How to load an image into blob in a custom form

Hi all!
is there some docs or how to, load am image into a database blob in a custom apps form.
The general idea is that the user has to browse the local machine find the image, and load the image in a database blob and also in the custom form and then finally saving the image as blob.
Thanks in advance
Soni

If this helps:
Re: Custom form: Take a file name input from user.
Thanks
Nagamohan

How to load an image from local filesystem, and paint it to a frame

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