code: public static int[] concatenate (int[] v1, int[] v2)
      {
          int[] values = new int[v1.length + v2.length];
          System.arraycopy(v1, 0, values, 0, v1.length);
          System.arraycopy(v2, 0, values, v1.length, v2.length);
          return values;
      }
docs: Creates a new array that contains the contents of the first parameter
  array followed by those of the second.