有五个学生，每个学生有3门课的成绩，从键盘输入以上数据（包括学生号，姓名，三门课成绩），计算出平均成绩，并存到磁盘中

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.Scanner;

public class ArraysDemo {
    public static void main(String[] args) {
        
        Student[] students = new Student[2];
        
        
        for(int i=0;i<students.length;i++) {
            Scanner in = new Scanner(System.in);
            System.out.println("输入第"+(i+1)+"个学生学号");
            String id = in.nextLine();
            System.out.println("输入姓名");
            String name = in.nextLine();
            System.out.println("输入语文成绩");
            int chinese = in.nextInt();
            System.out.println("输入数学成绩");
            int math = in.nextInt();
            System.out.println("输入英语成绩");
            int english  = in.nextInt();
            Student student = new Student();
            student.id=id;
            student.name=name;
            student.chinese=chinese;
            student.math=math;
            student.english=english;
            student.avg=(chinese+math+english)/3;
            students[i]=student;
        }
        for(int i=0;i<students.length;i++) {
            System.out.println(students[i]);
        }
        File file= new File("f:\\Score.txt");
        if(file.exists()){
            System.out.println("文件存在");
        }
        else{
            System.out.println("文件不存在，正在创建....");
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        FileOutputStream fileout=null;
        OutputStreamWriter output=null;
        try {
            fileout = new FileOutputStream(file);
            output = new OutputStreamWriter(fileout, "gbk");
            output.write("学号\t"+"姓名\t"+"语文\t"+"数学\t"+"英语\t"+"平均值\t");
            for(int i=0;i<students.length;i++) {
                output.write("\r\n"+students[i].id+"\t"+students[i].name+"\t"+students[i].chinese
                        +"\t"+students[i].math+"\t"+students[i].english+"\t"+students[i].avg);
                output.flush();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                output.close();
                fileout.close();
            }catch (Exception e) {
            }
        }
        
        
    }
    
}