Contents
规则
1 public static void main(String[] args) {
2 System.out.println(ball(5000000));
3 }
4
5 public static List<String> ball(int length) {
6 int max = 33;
7 int min = 1;
8 List<List<StringBuilder>> list = new ArrayList<>();
9 for (int m = 0; m < length; m++) {
10 List<StringBuilder> l = new ArrayList<>();
11 StringBuilder st = new StringBuilder();
12 for (int i = 0; i < 6; i++) {
13 int num = (int) (Math.random() * (max - min + 1) + min);
14 if (i == 0) {
15 st.append(num);
16 } else {
17 st.append(",").append(num);
18 }
19 }
20 int blue = (int) (Math.random() * (16 - min + 1) + min);
21 st.append(",").append(blue);
22 l.add(st);
23 list.add(l);
24 }
25 List<String> one = new ArrayList<>();
26 List<String> two = new ArrayList<>();
27 List<String> three = new ArrayList<>();
28 List<String> four = new ArrayList<>();
29 List<String> five = new ArrayList<>();
30 List<String> six = new ArrayList<>();
31 List<String> seven = new ArrayList<>();
32 for (List<StringBuilder> builderList : list) {
33 for (StringBuilder stringBuilder : builderList) {
34 String[] split = stringBuilder.toString().split(",");
35 one.add(split[0]);
36 two.add(split[1]);
37 three.add(split[2]);
38 four.add(split[3]);
39 five.add(split[4]);
40 six.add(split[5]);
41 seven.add(split[6]);
42 }
43 }
44 Map<String, Integer> onemap = count(one);
45 Map<String, Integer> twomap = count(two);
46 Map<String, Integer> threemap = count(three);
47 Map<String, Integer> fourmap = count(four);
48 Map<String, Integer> fivemap = count(five);
49 Map<String, Integer> sixmap = count(six);
50 Map<String, Integer> sevenmap = count(seven);
51 List<String> result = new ArrayList<>();
52 result.add(maxCount(onemap));
53 result.add(maxCount(twomap));
54 result.add(maxCount(threemap));
55 result.add(maxCount(fourmap));
56 result.add(maxCount(fivemap));
57 result.add(maxCount(sixmap));
58 result.add(maxCount(sevenmap));
59 return result;
60 }
61
62 private static Map<String, Integer> count(List<String> list) {
63 Map<String, Integer> map = new HashMap<>();
64 for (String s : list) {
65 if (map.containsKey(s)) {
66 int val = map.get(s);
67 map.put(s, val + 1);
68 } else {
69 map.put(s, 1);
70 }
71 }
72 return map;
73 }
74
75 private static String maxCount(Map<String, Integer> map) {
76 AtomicInteger temp = new AtomicInteger();
77 AtomicReference<String> key = new AtomicReference<>();
78 map.entrySet().stream().sorted(Collections.reverseOrder(Map.Entry.comparingByValue())).forEach(value -> {
79 if (temp.get() < value.getValue()) {
80 temp.set(value.getValue());
81 key.set(value.getKey());
82 }
83 });
84 return key.get();
85 }
86
87
