Question

I would like to convert integers to bytes. I have an example in Actionscript and I need to convert it to Java. For the sake of simplicity let’s assume only one number, 1234. This is my Java code:

int[] a = {1234};
ByteBuffer byteBuffer = ByteBuffer.allocate(a.length * 4);
IntBuffer intBuffer = byteBuffer.asIntBuffer();
intBuffer.put(a);
byte[] array = byteBuffer.array();
for (int i=0; i < array.length; i++) {
    Log.i(T, i + ": " + array[i]);
}

This gives me the following result:

0 : 0
1 : 0
2 : 4
3 : -46

While in Actionscript I have this:

var c:ByteArray = new ByteArray;
c.writeInt(1234);
for(var p:uint=0; p<c.length; p++) {
    trace(p+" : "+c[p]);
}

And the result:

0 : 0
1 : 0
2 : 4
3 : 210

What am I doing wrong, why is the result different? Thanks!

Answer 1

Java uses unsigned bytes.

ActionScript probably signed by default.

3 : -46 //signed
3 : 210 //unsigned

This can print every byte as unsigned:

System.out.println((b < 0 ? 256 + b : b));