JAVA8-Lambda-（sorted+Comparator）排序

使用场景：排队的时候按照个子大小排队

使用API

排序和MySql中的升序降序规则一样。

在排序时需要注意的是降序需要用到reversed()；

    public static void main(String[] args) {
        ArrayList<People> list = new ArrayList<>();
        list.add(new People("张三", 191, "杭州"));
        list.add(new People("李四", 182, "海口"));
        list.add(new People("王五", 173, "西安"));
        list.add(new People("赵六", 162, "兰州"));
        list.add(new People("二狗", 111, "杭州"));
        list.add(new People("铁柱", 171, "海口"));

        //按照身高排序(升序)
        List<People> PeopleAscList = list.stream()
                .sorted(Comparator.comparing(People::getHeight))
                .collect(Collectors.toList());
        System.out.println("按照身高排序(升序)：" + PeopleAscList);

        //按照身高排序(降序)
        List<People> PeopleDescList = list.stream()
                .sorted(Comparator.comparing(People::getHeight).reversed())
                .collect(Collectors.toList());
        System.out.println("按照身高排序(降序)：" + PeopleDescList);
    }

输出结果：

按照身高排序(升序)：[Student{name='二狗', height=111, addr='杭州'}, Student{name='赵六', height=162, addr='兰州'}, Student{name='铁柱', height=171, addr='海口'}, Student{name='王五', height=173, addr='西安'}, Student{name='李四', height=182, addr='海口'}, Student{name='张三', height=191, addr='杭州'}]

按照身高排序(降序)：[Student{name='张三', height=191, addr='杭州'}, Student{name='李四', height=182, addr='海口'}, Student{name='王五', height=173, addr='西安'}, Student{name='铁柱', height=171, addr='海口'}, Student{name='赵六', height=162, addr='兰州'}, Student{name='二狗', height=111, addr='杭州'}]