跪求JAVA保齡球

import java.io.FileNotFoundException;

import java.io.PrintWriter;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Date;

import java.util.LinkedList;

import java.util.List;

import java.util.Scanner;

/**

* @author wsj

* @date 2010-6-23, 下午11:51:00

*/

public class StudentBow {

public static Scanner sc=new Scanner(System.in);

public static int point=6;//進壹個球的分數

public static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");//自定義時間格式

public static void main(String[] args) {

List<Student> stuList=createStudents();//輸入學生及進球信息

System.out.println("-----------------------排序前為-------------------------");

outPutStudentsToConsole(stuList);

outPutStudentsToFile(stuList, "students.txt");

System.out.println("\n********************輸出的學生及進球信息到 d:/student.txt\n");

System.out.println("-----------------------排序後為-------------------------");

Collections.sort(stuList);

outPutStudentsToConsole(stuList);

outPutStudentsToFile(stuList, "afterSort.txt");

System.out.println("\n******************輸出的學生及進球信息到 d:/afterSort.txt\n");

System.out.println("----------------------開始查找用戶-----------------------");

System.out.print("輸入要查找的用戶學號no:");

String searchNo=sc.next();

Student s=search(stuList, searchNo);

if(s==null){

System.out.println("未找到此用戶");

}else {

System.out.println("查找結果為："+s.toString());

}

}

/**

* 輸入學生信息,生成學生數組

*/

private static Student inputStudentInfo() {

String no;

String name;

Date birthDay;

String birthStr=null;

try {

System.out.print("輸入學生學號:");

no=sc.next();

System.out.print("輸入學生姓名:");

name=sc.next();

System.out.print("輸入出生年月日,格式為yyyy-MM-dd,如2009-8-8:");

birthStr=sc.next();

birthDay=sdf.parse(birthStr);

return new Student(no,name,birthDay);

} catch (ParseException e) {

System.out.println("------------非法輸入,結束該名學生信息輸入-------------");

return null;

}

}

/**

* 輸入某個學生所進的球信息

*/

private static void inputBalls(Student s){

String stuInfo=s.no+","+s.name;

int count=1;

System.out.println("---------輸入學生"+stuInfo+"每局的進球情況,以end字符結束輸入----------");

String input;

BowScore bowScore=new BowScore(s);

s.bowScore=bowScore;

try {

while (true) {

System.out.print("輸入"+stuInfo+"第 "+count+" 局進球數,以end字符結束輸入:");

input=sc.next();

if("end".equalsIgnoreCase(input)) break;

bowScore.ballList.add(Integer.valueOf(input));

count++;

}

} catch (NumberFormatException e) {

System.out.println("----------------非法輸入,結束學生"+stuInfo+"進球情況輸入------------------");

}

System.out.println("----------------結束學生"+stuInfo+"進球情況輸入------------------");

}