java - 集合排序 - 正序、0、负序

Question

我有一组员工。每个员工都有一个 ID。该 ID 号的格式为 -x >= 0 >= x 。我必须按照 0...x -1....-x 的顺序对员工进行排序。我该怎么做？？

List<Employee> empSort = new ArrayList(em.getEmployees());
Collections.sort(empSort, new Comparator<Employee>() {
                @Override
                public int compare(Employee p1, Employee p2) {
                   // WHAT LOGIC SHOULD I DO THERE TO HAVE THEM
                                      SORTED AS 0...x -1....-x
                }
            });

Answer 1

晚餐时考虑了一下，我更喜欢这个。

int sign1 = (p1 >= 0) ? 1 : -1;
int sign2 = (p2 >= 0) ? 1 : -1;

int result = Integer.compare(sign2, sign1);

if( result == 0){
    // same sign
    result = sign1 * Integer.compare(p1, p2);
}
return result;

输出仍然是:

[0, 0, 0, 1, 3, 5, -1, -2]