1. 改变原list集合

• code

class NrscDemoApplicationTests {

    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    static class Human {
        private String name;
        private int age;
    }

    @Test
    void changeOriginalList() {

        List<Human> humans = Lists.newArrayList(
                new Human("yoyo", 12),
                new Human("yoki", 12),
                new Human("nrsc", 10),
                new Human("nrfx", 10));

        //排序
        humans.sort(Comparator.comparing(Human::getAge).thenComparing(Human::getName));
        System.out.println(humans);

    }
}

• 结果截图

2. 不改变原list集合

• code

class NrscDemoApplicationTests {

    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    static class Human {
        private String name;
        private int age;
    }

    @Test
    void changeOriginalList() {

        List<Human> humans = Lists.newArrayList(
                new Human("yoyo", 12),
                new Human("yoki", 12),
                new Human("nrsc", 10),
                new Human("nrfx", 10));

        //排序
        List<Human> collect = humans.stream()
                .sorted(Comparator.comparing(Human::getAge).thenComparing(Human::getName))
                .collect(Collectors.toList());

        System.err.println(humans);
        System.out.println(collect);

    }
}

• 结果截图