PTA期末成绩排序java

定义一个名为Student的类，该类包含学号和成绩两个属性。使用Arrays.sort()方法对学生对象数组按成绩进行排序，然后按照样例输出排名。

import java.util.Arrays;

class Student implements Comparable<Student> {
    private int num;
    private float score;

    public Student(int num, float score) {
        this.num = num;
        this.score = score;
    }

    public int getNum() {
        return num;
    }

    public float getScore() {
        return score;
    }

    @Override
    public int compareTo(Student s) {
        return Float.compare(s.score, this.score);
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        Student[] students = new Student[n];
        for (int i = 0; i < n; i++) {
            int num = sc.nextInt();
            float score = sc.nextFloat();
            students[i] = new Student(num, score);
        }
        Arrays.sort(students);

        int m = 1;
        int buff = 1;
        for (int i = 0; i < n; i++) {
            System.out.printf("%d %d %.2f\n", m, students[i].getNum(), students[i].getScore());
            if (i + 1 < n && students[i].getScore() == students[i + 1].getScore()) {
                buff++;
            } else {
                m += buff;
                buff = 1;
            }
        }
    }
}