You have an infinite loop when i < 2^30.

  static int nextOne(int theInt) {
    int answer = 1;
    while (answer < theInt && 0 < answer) {
      answer <<= 1;
    }
    if (answer < 1) {
      throw new IllegalArgumentException("Sorry, " +
        theInt + " is bigger than 2 to the power of 30 (1073741824).");
    }
    return answer;
  }