Java List 多优先级排序

题目

class User {
    String name;
    String sex;
    int age;
    int point;

    public User(String name, String sex, int age, int point) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.point = point;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", age=" + age +
                ", point=" + point +
                '}';
    }
}
JAVA

//第一优先级age<=12 -> female -> male
//第二优先级 point 由大到小
List<User> list = new ArrayList<>();
list.add(new User("lilei", "male", 11, 120));
list.add(new User("hanmeimei", "female", 10, 126));
list.add(new User("zhaolaoshi", "male", 54, 100));
list.add(new User("lilaoshi", "female", 41, 150));
list.add(new User("xiaozhang", "female", 75, 155));
list.add(new User("laozhuren", "male", 55, 145));
list.add(new User("shenayi", "female", 19, 127));
JAVA

Solution

需要重写compare方法

package com.hao;


import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        //第一优先级age<=12 -> female -> male
        //第二优先级 point 由大到小
        List<User> list = new ArrayList<>();
        list.add(new User("lilei", "male", 11, 120));
        list.add(new User("hanmeimei", "female", 10, 126));
        list.add(new User("zhaolaoshi", "male", 54, 100));
        list.add(new User("lilaoshi", "female", 41, 150));
        list.add(new User("xiaozhang", "female", 75, 155));
        list.add(new User("laozhuren", "male", 55, 145));
        list.add(new User("shenayi", "female", 19, 127));
        list.sort(comparator);
        for (User user : list) {
            System.out.println(user);
        }
    }

    public static Comparator<User> comparator = new Comparator<User>() {
        @Override
        public int compare(User o1, User o2) {
            //第一优先级age<=12 -> female -> male
            //第二优先级 point 由大到小
            int result = 0;
            if (o1.age <= 12 && o2.age > 12) {
                result = -1;
            } else if (o2.age <= 12 && o1.age > 12) {
                result = 1;
            } else {
                if (o1.sex.equals("female") && !o2.sex.equals("female")) {
                    result = -1;
                } else if (o2.sex.equals("female") && !o1.sex.equals("female")) {
                    result = 1;
                } else {
                    int a = o1.point - o2.point;
                    if (a != 0) {
                        result = a > 0 ? -1 : 1;
                    } else {
                        result = 0;
                    }
                }
            }
            return result;
        }
    };
}

class User {
    String name;
    String sex;
    int age;
    int point;

    public User(String name, String sex, int age, int point) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.point = point;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", age=" + age +
                ", point=" + point +
                '}';
    }
}

JAVA

Result

User{name='hanmeimei', sex='female', age=10, point=126}
User{name='lilei', sex='male', age=11, point=120}
User{name='xiaozhang', sex='female', age=75, point=155}
User{name='lilaoshi', sex='female', age=41, point=150}
User{name='shenayi', sex='female', age=19, point=127}
User{name='laozhuren', sex='male', age=55, point=145}
User{name='zhaolaoshi', sex='male', age=54, point=100}
ROUTEROS