Java 自定义按时间先后顺序排序集合

List<Date> dateList = new ArrayList<>();

dateList.add(date2);

dateList.add(date1);

dateList.add(date3);

//按事件时间倒序排序

Comparator<Object> c = new Comparator<Object >() {

@Override

public int compare(Date d1, Date d2) {

if(d1.before(d2)) {

return 1;

}else {

return -1;

}

}

};

Collections.sort(dateList,c);