Java学生成绩管理系统源代码

import Java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.io.StringReader;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.HashMap;

import java.util.Iterator;

import java.util.StringTokenizer;

/*

* Created on 2005-1-11

*/

/**

* @author 让炜

* @since 1.0

*

* TODO 学生成绩治理系统

* 通过学号查找,修改,删除数据

*

*/

public class LittleProgram

{

static boolean isDelete = true;

static boolean isFind = true;

public static void main(String [] args)//主方法,程序从这里开始运行

throws IOException,NumberNotFoundException

{

int choice=-1;

do{

LittleProgram lp = new LittleProgram();

System.out.println();

System.out.println("\t####################################");

System.out.println();

System.out.println("\t\t Java学生成绩治理系统1.1");

System.out.println("\t\t请用学号查找,修改,删除数据");

System.out.println();

System.out.println("\t####################################\n");

System.out.print("1.增加数据:\n"+

"2.查找数据:\n"+

"3.删除数据:\n"+

"4.清除所有数据:\n"+

"5.把数据全部打印到屏幕\n"+

"6.把成绩按学号排序\n"+

"7.修改数据\n"+

"8.统计已记录成绩学生数\n"+

"9.关于作者\n"+

"0.退出程序.\n" +

"输入:");

BufferedReader in = //从终

new BufferedReader( //端接

new InputStreamReader(System.in));//收数

String inputLine = in.readLine(); //字选

choice= Integer.valueOf(inputLine).intValue();//项;

switch(choice)

{

case 1: {//1.增加数据

String str = lp.inputData();

lp.addData(str);

System.out.println("增加数据成功.");

timeOut(1);

}break;

case 2: {//2.查找数据

long find = 0;