BufferedImage produces black output

Question

BufferedImage for some reason produces black output when I write scaled Image, however Image scales it correctly. I assume here are some problems with painting components. Thank you!

is it supposed to be transparent? if so .jpg files dont have transparency, you have to use .png — JRowan, Nov 25 '14 at 03:21
Of course not, this is a normal RGB image, however it does not write to Imagebuffer for some reason. — ProgLearner, Nov 25 '14 at 03:23
oh, im just thought you meant that its showing up black, transparency in .jpg file would be black — JRowan, Nov 25 '14 at 03:25
@JRowan thanks for your reply. WHEN BufferedImage.TYPE_INT_RGB produces black AND THEN BufferedImage.TYPE_INT_ARGB, orange color image. — ProgLearner, Nov 25 '14 at 03:39
*"BufferedImage.TYPE_INT_ARGB, orange color image."* Are you still saving as JPEG? Saving an `ARGB` image as JPEG will cause unpredictable results - don't do it! — Andrew Thompson, Nov 25 '14 at 03:40

score 3 · Accepted Answer · answered Nov 25 '14 at 03:27

BufferedImage newImage = new BufferedImage(400, 400, BufferedImage.TYPE_INT_RGB);

If putting a PNG or GIF with transparency over it, the transparent parts will become black. It should be:

BufferedImage newImage = new BufferedImage(400, 400, BufferedImage.TYPE_INT_ARGB);

But then, I recommend:

Only save as JPEG if the original image was JPEG
Not using an ImageIcon to load an Image, instead use ImageIO to load a BufferedImage.
Use the buffered image getType() as the parameter instead of BufferedImage.TYPE_..
Avoid getScaledInstance(..) like the plague, but if using it, specify Image.SCALE_SMOOTH.

BufferedImage produces black output

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