java中怎样去除list中重复的数据,并且显示重复数据的条数答:List<String> list = Arrays.asList("day", "walipo", "day", "walipo", "legeand", "day", "douwbo", "day", "day");Map<String, Long> collect = list.stream().collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));System.out.println(collect);最后返回的...