Java screen capture using robot class

I use robot class to take capture and save the file on C: drive in xp. It works fine, but when used with windows 7 i get exception saying access denied, accessing file using native method.

Is 开发者_如何转开发it because i am using C: drive and not the system tmp directory or something else? I do not have windows 7 to test it here, thats why asking.

Code is something like this:

Dimension screenSize;
Rectangle screenRectangle;
BufferedImage image;

for (int i=0; i<j; i++){
    img[i] = "C:\\"+(i+1)+".jpg"; //e.g 1.jpg saved in C: drive on 1st itr.
    screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    screenRectangle = new Rectangle(screenSize);
    image = robot.createScreenCapture(screenRectangle);
    ImageIO.write(image, "jpg", new File(img[i]));
}

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Write permissions for the root directory are by default off in Windows 7. You can change your code to

img[i] = (i+1)+".jpg";

in order to write your screen-capture images to the same directory from which you launched the jvm.