Wonder-Land Number

This a way to generate the wonderland number.

It has six digits.

If you multiply it by 2,3,4,5, or 6, the resulting number has all the same digits in at as the original number.

The only difference is the position that they are in.

Source: https://github.com/gigasquid/wonderland-clojure-katas

import java.util.ArrayList;

import java.util.List;

public class WonderLandNumber {

     public static void main(String[] args) {         

          for (int i = 100000; i < 1000000; i++) {

               if (isWonderLandNumber(i)) {

                    System.out.println(i);

                    break;

               }

          }

     }

     public static boolean isWonderLandNumber(int number) {

          return containsAll(number, 2 * number) && containsAll(number, 3 * number) && containsAll(number, 4 * number)

                    && containsAll(number, 5 * number) && containsAll(number, 6 * number);

     }

     public static boolean containsAll(int number, int multiple) {

          String one = String.valueOf(number);

          String two = String.valueOf(multiple);

          return one.length() == two.length() && getDigits(one).containsAll(getDigits(two));

     }

     public static List getDigits(String number) {

          List digits = new ArrayList<>();

          for (String digit : number.split("")) {

               digits.add(digit);

          }

          return digits;

     }

}

Output:

142857