How to store a byte array as an image file on disk?

Question

I have a byte array representation of a Image. How to save it on disk as an image file.

I have already done this

OutputStream out = new FileOutputStream(         


        

Answer 1

You can use ImageIO API.

The details can be a bit hairy, but first you'll probably want to create a BufferedImage using TYPE_BYTE_INDEXED type and some suitable IndexColorModel instance. Then put your byte array there. Hint: you can get the internal representation of BufferedImage with:

myDataBuffer = myBufferedImage.getRaster().getDataBuffer();

Which will likely return a data buffer of type DataBufferByte (check!), from which you get a byte array with

myByteArray = ((DataBufferByte) myDataBuffer).getData();

Then you can use System.arraycopy to copy your byte array onto that.