Random1to8.java

import java.util.Arrays;

/**
 * Created on 14-6-18
 * output:
   50058:49942
   So, get0or1 works fine.
   [12674, 12405, 12604, 12519, 12321, 12520, 12528, 12429]
 * @author rankun203@gmail.com
 */
public class Random1to8 {
    public static void main(String[] args) {
        int lessPart = 0;
        int morePart = 0;
        for (int i = 0; i < 100000; i++) {
            switch (get0or1()) {
                case 0:
                    ++lessPart;
                    break;
                case 1:
                    ++morePart;
                    break;
            }
        }
        System.out.println(lessPart + ":" + morePart);

        System.out.println("So, get0or1 works fine.");

        int[] nums = new int[8];
        for (int i = 0; i < 100000; i++) {
            nums[get1to8() - 1]++;
        }

        System.out.println(Arrays.toString(nums));
    }

    /*************Random get 1 to 8***************/
public static int get1to8() {
    return get0or1() + get0or1() * 2 + get0or1() * 4 + 1;
}
/********************End**********************/
    public static int get0or1() {
        return Math.random() > 0.5 ? 1 : 0;
    }

}