用java编写输入学生姓名，Java成绩，按分数从高到低排序后存储在文件score.txt中。

以下是一个示例代码，实现输入学生姓名和Java成绩，并按照成绩从高到低排序后将数据存储到文件中。

import java.io.*;
import java.util.*;

public class ScoreSorter {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<Student> students = new ArrayList<>();

        // 输入学生信息
        while (true) {
            System.out.print("请输入学生姓名（输入exit退出）：");
            String name = scanner.next();
            if (name.equals("exit")) {
                break;
            }
            System.out.print("请输入Java成绩：");
            int score = scanner.nextInt();
            students.add(new Student(name, score));
        }

        // 按照成绩从高到低排序
        Collections.sort(students);

        // 将数据写入文件
        try (PrintWriter writer = new PrintWriter(new FileWriter("score.txt"))) {
            for (Student student : students) {
                writer.println(student.getName() + " " + student.getScore());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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

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

    public String getName() {
        return name;
    }

    public int getScore() {
        return score;
    }

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

运行程序后，输入学生姓名和Java成绩，程序会将数据按照成绩从高到低排序，并将排序后的数据存储到文件score.txt中。