学生排序（JAVA）

请创建学生类（ Student ），用于存储学生信息。

创建 ArrayList 集合，依次存储如下5位同学的信息，

并使 用 Comparable 或 Comparator 接口对5位同学的成绩做降序排序，

如果成绩一样，那在成绩排序的基础上按 照年龄由小到大排序。

最后遍历并输出 ArrayList 集合中的数据。

姓名（String）   年龄（int）   分数（double）

        张三                 20                 90.0‍

        李四                 22                 90.0

        王五                 20                 99.0

        孙六                 22                 100.0

        赵七                 20                 100.0

代码示例：

public class Student {
    private String name;
    private int age;
    private double score;

    public Student(String name, int age, double score) {
        this.name = name;
        this.age = age;
        this.score = score;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public double getScore() {
        return score;
    }

    public String toString() {
        return "Student[" + "name='" + name + ", age=" + age + ", score=" + score + "]";
    }
}

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

public class Main {
    public static void main(String[] args) {
        ArrayList<Student> studentList = new ArrayList<>();
        studentList.add(new Student("张三",20,90.0));
        studentList.add(new Student("李四",22,90.0));
        studentList.add(new Student("王五",20,99.0));
        studentList.add(new Student("马六",22,100.0));
        studentList.add(new Student("赵七",20,100.0));

        Comparator<Student> studentComparator = (s1,s2) ->{
            if (s1.getScore() > s2.getScore())return -1;
            else if (s1.getScore() < s2.getScore())return 1;
            else return Integer.compare(s1.getAge(), s2.getAge());
        };
        studentList.sort(studentComparator);

        for (Student student:studentList){
            System.out.println(student);
        }

    }
}

效果：