OutputStream to byte Array

ByteArrayOutputStream baos = new ByteArrayOutputStream();
int red = 0;
boolean finished = false;
byte[] tempdata = new byte[1024];
while (!finished) {
  red = instr.read(tempdata);
  if (red > 0) {
    baos.write(tempdata, 0, red);
  } else {
    finished = true;
  }
}
baos.flush();
byte[] data = baos.toByteArray();
baos.close();