Question

I have a short[512×512] array need to write to a binary file with little endian. I know how to write one short to file with little endian. I think there is may be better ways than loop through the array writing one by one.

Answer 1

Somewhat like this:

short[] payload = {1,2,3,4,5,6,7,8,9,0};
ByteBuffer myByteBuffer = ByteBuffer.allocate(20);
myByteBuffer.order(ByteOrder.LITTLE_ENDIAN);

ShortBuffer myShortBuffer = myByteBuffer.asShortBuffer();
myShortBuffer.put(payload);

FileChannel out = new FileOutputStream("sample.bin").getChannel();
out.write(myByteBuffer);
out.close();

And somewhat like this to get it back:

ByteBuffer myByteBuffer = ByteBuffer.allocate(20);
myByteBuffer.order(ByteOrder.LITTLE_ENDIAN);
FileChannel in = new FileInputStream("sample.bin").getChannel();
in.read(myByteBuffer);
myByteBuffer.flip();
in.close(); // do not forget to close the channel

ShortBuffer myShortBuffer = myByteBuffer.asShortBuffer();
myShortBuffer.get(payload);
System.out.println(Arrays.toString(payload));