Question

I want to make sure that an image in my application is not more than 200×200 px and the image size is not more than 150 kB. For example, if the file size of image is more than 150 kB i need to make it 150 kB. The image can be of type jpeg,png etc.

I have the following code for resizing an image to a given width and height

private BufferedImage resize(BufferedImage img, int newW, int newH) {
        int w = img.getWidth();
        int h = img.getHeight();
        BufferedImage dimg = new BufferedImage(newW, newH, img.getType());
        Graphics2D g = dimg.createGraphics();
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g.drawImage(img, 0, 0, newW, newH, 0, 0, w, h, null);
        g.dispose();
        return dimg;
    }

But im not sure how to go about reducing the file size to 150 kB. How to do that in java ?.Some example would be really appreciated.

Thank You

Answer 1

Just as an option – image magic – it also has some convenience wrappers for Java, so you can easily use it.