thumbnail

[sakurasyi]

hai guys... can someone solve my problems?

i'm doing a thumbnail program. But, i have some problems.
1. The thumbnail image become black (cannot see anything)
2. Can anyone know how to get the size (height and width) of the original image?

this is my code:
Image image = Toolkit.getDefaultToolkit().getImage(namePath);
MediaTracker mediaTracker = new MediaTracker(new Container());
mediaTracker.addImage(image, 0);
mediaTracker.waitForID(0);

int thumbWidth = 600; // how to get the original size???
int thumbHeight = 800;// how to get the original size???

// determine thumbnail size from WIDTH and HEIGHT
double thumbRatio = (double)thumbWidth / (double)thumbHeight;
int imageWidth = image.getWidth(null);
int imageHeight = image.getHeight(null);
double imageRatio = (double)imageWidth / (double)imageHeight;

if (thumbRatio < imageRatio) {
thumbHeight = (int)(thumbWidth / imageRatio);
} else {
thumbWidth = (int)(thumbHeight * imageRatio);
}

BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = thumbImage.createGraphics();

graphics2D.setRenderingHint(RenderingHints.KEY_INT ERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);

BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file1));

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);
int quality = 100;
quality = Math.max(0, Math.min(quality, 100));
param.setQuality((float)quality / 100.0f, false);

encoder.setJPEGEncodeParam(param);
encoder.encode(thumbImage);
out.close();

thank you