设计思路：

比较器首先Comparable<T>,并使用Array.sort()进行排序，最后使用Array.toString()进行输出显示。

代码实现：

首先进行学生类的创建，学生类进行接口Comparable<T>的实现。

public class Student implements Comparable<Student>{
    private String name;
    private double score;

    public Student() {
    }

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

    public String getName() {
        return name;
    }

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

    public double getScore() {
        return score;
    }

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

    @Override
    public String toString() {      // 变量变字符串
        return "|" + "姓名：" + name +
                ", 成绩：" + score + "|";
    }

    @Override
    public int compareTo(Student student) {     // 重写方法，比较大小，小于返回负整数，等于返回0，大于返回正整数
        return (int)(this.score - student.score);
    }


}

然后定义一个接口对设置学生信息类进行标准化：

public interface ISetStudent {
    public Student[] setStudentsArray();
}

然后定义一个学生信息设置类进行对学生的姓名和成绩进行设置：

import java.util.Scanner;

public class SetStudent{
    public Student[] setStudentsArray(){    // 设置个数并返回学生类数组
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入添加的个数：");
        int count = sc.nextInt();
        Student[] students = new Student[count];
        for (int i = 0; i < count; i++) {
            System.out.println("第【"+(i+1)+"】个:");
            students[i] = new SetStudent().setStudent(new Student());       // 设置数组元素
        }
        return students;    // 返回学生类数组
    }
    private Student setStudent(Student student){    // 设置学生姓名和成绩信息
        Scanner sc = new Scanner(System.in);
        System.out.print("姓名：");
        student.setName(sc.next());
        System.out.print("成绩：");
        student.setScore(sc.nextDouble());
        return student;
    }
}

利用工厂类进行对象的获取：

public class Factory{
    public static ISetStudent getInstance(){
        return new SetStudent();
    }
}

客户端调用：

import java.util.Arrays;

public class MAIN {
    public static void main(String[] args) {
        Student[] st = Factory.getInstance().setStudentsArray();
        Arrays.sort(st);
        System.out.println(Arrays.toString(st));
    }
}