Screenshot In Java

Question

Well, since focusing on a window and finding the dimensions etc. are not possible, I decided it may be able to work with screenshots.
I tried using createScreenCapture and it was wayyy to slow, it took about a second to take a screenshot. I read that using the Robot peer class is much faster, so I am attempting to use that. Now, I got all the pixel information using getRGBPixels, and strored it into an array. Now the question is, how do I generate and image and save it with that information?
I am trying to take a few screenshots a second, maybe up to 10.
Thanks

Answer 1

The Robot screen capture shouldn't really take more than a hundred milliseconds. I would say it should take between 20 to 100 milliseconds depending on your screen resolution and how fast your computer is. Whether you find a faster way to take screen shots or not the bottleneck will be writing the images to files (what is this Robot "peer" class anyway?)
But to answer your question, this is how you can turn an int array of rgb values directly into an image:
int[] rgbPixels = ...
ColorModel cm = new DirectColorModel(24,
                                     0x00ff0000,
                                     0x0000ff00,
                                     0x000000ff,
                                     0x0);
int bandMasks[] = new int[]{0x00ff0000,
                            0x0000ff00,
                            0x000000ff};
DataBuffer buffer = new DataBufferInt(rgbPixels,rgbPixels.length);
WritableRaster rast = Raster.createPackedRaster(buffer,/**width*/,/**height*/,/*width*/,bandMasks,null);
BufferedImage image = new BufferedImage(cm,rast,false,null);Supply the width and height that describes the rgbPixels where noted. If the size is the resolution of the screen, then you can obtain that information with the current GraphicsConfiguration.