Java数组分级

Question

我在找一些关于我的代码的输入。我想要做的是让用户以考试分数的形式输入。用户可以输入他们需要输入多少等级，并将它们存储在数组中。然后程序将在一个曲线上评分，最高的是A，如果一个分数在最高分数的10分以内，它也是一个A，如果它在10到20分之间比较高的分数低一个B，如果它的20到30分比最高的分数小，那么它就是一个C，等等。

我的问题是，我不知道如何将某一元素与最高元素进行比较，以确定它的等级。那么，我的问题是，如何将数组中的某个元素与数组中的最高元素进行比较？

import java.util.Scanner;

public class StudentGrades {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        int students;


        System.out.println("How many students do you have?");
        students = keyboard.nextInt();
        while (students < 0) {
            System.out.println("Invalid student amount");
            students = keyboard.nextInt();
        }
        int[] kids = new int[students];

        double[] scores = new double[students];

        for (int index = 0; index < students; index++) {

            System.out.println("Enter score for student #" + (index + 1) + ": ");
            scores[index] = keyboard.nextDouble();

        }
        double high = scores[0];
        for (int index = 1; index < scores.length; index++) {
            if (scores[index] > high) ;
            high = scores[index];

        }

        if (//place in array >= (highest-10)
                System.out.println("Student (whatever there position is) has an A")
    }

}

所以，如果有人能给我一些关于这个问题的见解，我会很感激，如果你看到任何错误的代码，请告诉我。任何帮助都会很好。为了澄清我的问题，我想找出信的等级。查看底部的if语句。

Answer 1

如果我是你，我会这样做：

public class Student implements Comparable{

    int index;
    private double grade;

    public Student(int i, double d) {
        grade = d;
        index = i;
    }

    public int getIndex() {
        return index;
    }

    public double getGrade() {
        return grade;
    }

    public void setGrade(double grade) {
        this.grade = grade;
    }

    @Override
    public int compareTo(Object o) {
        Student s = (Student)o;

        if (s.getGrade() < grade){
            return -1;
        } else if (s.getGrade() == grade) {
            return 0;
        }
        return 1;
    }
}

应用程序的驱动程序是：

   public static void main(String[] args) throws Exception {

        Scanner keyboard = new Scanner(System.in);
        int amount;

        System.out.println("How many students do you have?");
        amount = keyboard.nextInt();
        while (amount < 0) {
            System.out.println("Invalid student amount");
            amount = keyboard.nextInt();
        }

        Student[] students = new Student[amount];
        for (int index = 0; index < amount; index++) {
            System.out.println("Enter score for student #" + (index + 1) + ": ");
            students[index] = new Student(index, keyboard.nextDouble());
        }

        Arrays.sort(students);

        for (int i = 0; i < amount / 10 + 1; i++) {
            System.out.println("Student " + (students[i].getIndex() + 1) + " has an A");
        }
    }

编辑：

关于“任择议定书”的补充说明，请在评论中提出：

double highest = students[0].getGrade();
for (Student s : students) {
    if (s.getGrade() > highest) {
        highest = s.getGrade();
    }
}