小肚皮上机题

package com.leon; import java.util.ArrayList; /**  * @author leon  * @version 1.0  * @date 2019/7/22 20:59  */ public class Main { // 取随机数存入到list  private static ArrayList<Integer> randomList(int size) {
        ArrayList<Integer> list = new ArrayList<>(); int rz = 0; int num = 0; while (rz < size) {
            num = (int) (size * Math.random()); if (list.contains(num)) continue;
            list.add(num);
            rz++;
        } return list;
    } // Tuesday  public static ArrayList<String[]> TuesdayOut(String[] s1, String[] s2) { if (s1 == null || s2 == null || s1.length != s2.length) return null;
        ArrayList<String[]> list = new ArrayList<>(); int size = s1.length; // 随机数，存入list1  ArrayList<Integer> list1 = randomList(size);
        ArrayList<Integer> list2 = randomList(size); // 2.匹配  int index = 0; int n = 0; int m = 0; while (index < list1.size()) {
            String[] s = new String[4]; for (int i = 0; i < 2; i++) { if (index < list1.size()) {
                    n = list1.get(index);
                    m = list2.get(index);
                    index++;
                    s[i] = s1[n];
                    s[i + 2] = s2[m];
                }
            }
            list.add(s);
        } return list;
    } // Thursday  public static ArrayList<String[]> ThursdayOut(ArrayList<String[]> list, String[] s1, String[] s2) {
        ArrayList<String[]> tuesList = TuesdayOut(s1, s2); for (int i = 0; i < list.size(); i++) {
            String[] a = list.get(i);
            String[] b = tuesList.get(i); for (int j = 0; j < 4; j++) { if (a[j].equals(b[j]))
                    tuesList = TuesdayOut(s1, s2);break;
            }
        } return tuesList;
    } // 打印数组  private static void printArray (ArrayList<String[]> list){ for (int i = 0; i < list.size(); i++) {
            String[] s = list.get(i); for (String a : s) {
                System.out.print(a + " ");
            }
            System.out.println();
        }
    } public static void main(String[] args) {
        String[] s1 = {"a", "b", "c", "d", "e", "f", "g", "h"};
        String[] s2 = {"A", "B", "C", "D", "E", "F", "G", "H"};
        ArrayList<String[]> list = TuesdayOut(s1, s2);
        ArrayList<String[]> list1 = ThursdayOut(list, s1, s2); printArray(list);
        System.out.println(); printArray(list1);
    }
}