stream 两个list处理去除相同元素

List<Data> data1 = new ArrayList<>();

data1.add(new Data(7, 15));

data1.add(new Data(2, 17));

data1.add(new Data(2, 17));

 

List<Data> data2 = new ArrayList<>();

data2.add(new Data(1, 11));

data2.add(new Data(10, 9));

data2.add(new Data(10, 9));

data2.add(new Data(7, 15));

data2.add(new Data(2, 17));

data2.add(new Data(2, 17));

 

List<Data> result = data2.stream()

        .filter(d1 ->

                data1.stream()

                    .noneMatch(d2 -> Objects.equals(d1.getId(), d2.getId()))

        ).collect(Collectors.toList());

System.out.println(result);