import javax.naming.Name;
import java.util.Arrays;
import java.util.Comparator;

class Student1 {
    private String name;
    private int age;
    private double score;

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public Student1(String name, int age, double score) {
        this.name=name;
        this.age=age;
        this.score=score;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student1{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", score=" + score +
                '}';
    }
}

class AgeComparator implements Comparator<Student1> {

    @Override
    public int compare(Student1 o1, Student1 o2) {
        return o1.getAge()-o2.getAge();
    }
}

class NameComparator implements Comparator<Student1> {

    @Override
    public int compare(Student1 o1, Student1 o2) {
        return o2.getName().compareTo(o1.getName());
    }
}

class ScoreComparator implements Comparator<Student1> {

    @Override
    public int compare(Student1 o1, Student1 o2) {
        return (int)( o1.getScore()-o2.getScore());
    }
}


public class TestComparator {
    public static void main(String[] args) {
        Student1[] students=new Student1[3];

        students[0]=new Student1("鸢也",20,99.9);
        students[1]=new Student1("张三",18,89.8);
        students[2]=new Student1("李四",25,78.8);

        System.out.println("排序前：" + Arrays.toString(students));
        AgeComparator ageComparator=new AgeComparator();
        NameComparator nameComparator=new NameComparator();
        ScoreComparator scoreComparator=new ScoreComparator();
        Arrays.sort(students,scoreComparator);
        System.out.println("排序后： " +Arrays.toString(students));
    }

}