public int[] plusTwo(int[] a, int[] b) {
  int[] c = new int[4];
  c[0] = a[0];
  c[1] = a[1];
  c[2] = b[0];
  c[3] = b[1];
  return c;
}

public int[] plusTwo(int[] a, int[] b) {
  int[] c = { a[0], a[1], b[0], b[1] };
  return c;
}