import java.util.*;
public class Test {
    public static void main(String[] args) throws Throwable {
        q1();
        q2();
    }

    public static void q1() throws Throwable {
        List<Integer> l1 = new ArrayList<Integer>(Arrays.asList(new Integer[]{0,2,4,6,8}));
        List<Integer> l2 = new ArrayList<Integer>(Arrays.asList(new Integer[]{0,1,3,5,7,9}));

        List<Integer> list = new ArrayList<Integer>();
        for (int i=0; i<4; i++) {
            list.add(l1.remove((int)(Math.random()*l1.size())));
            list.add(l2.remove((int)(Math.random()*l2.size())));
        }
        int idx = 0;
        do {
            idx = (int)(Math.random()*list.size());
        } while (list.get(idx) == 0);
        int sum = list.remove(idx);
        for (int i=1; i<8; i++) {
            sum = sum*10 + list.remove((int)(Math.random()*list.size()));
        }
        System.out.printf("随机8位数是: %d\n", sum);
        char[] c = String.valueOf(sum).toCharArray();
        int start = 0;
        if (sum%2 == 0) {
            System.out.println("奇数位是:");
        } else {
            System.out.println("偶数位是:");
            start = 1;
        }
        for (; start < c.length; start+=2) {
            System.out.printf("%c ", c[start]);
        }
        System.out.println();
    }

    public static void q2() throws Throwable {
        List<String> list = new ArrayList<String>(Arrays.asList("123456".split("(?<=\\d)")));
        System.out.println("原始6位数(123456)");
        for (int i=0; ! list.get(0).equals("0"); i++) {
            System.out.println("----------我是分隔线----------");
            String s = list.get(0);
            int idx = Integer.valueOf(s);
            System.out.printf("第一个1个数是: %s, 左移%s位\n", s, s);
            for (int j=0; j<idx%6; j++) {
                list.add(list.remove(0));
            }
            System.out.println(list.toString().replaceAll("\\D+", ""));
            System.out.printf("第%s位+%s\n", s, s);
            
            int v = (Integer.valueOf(list.get(idx%6-1)) + idx)%10;
            list.set(idx%6-1, String.valueOf(v));
            System.out.println(list.toString().replaceAll("\\D+", ""));

            if (i > 6) {break;}  //测试6次        
        }        
    }
}