模拟火车票售票系统（多线程运用）

弄了一整天，没弄好，老是在开头出现空指针异常坏了2个售票窗口，望高人指定。我表示多线程好难玩，

import java.util.LinkedList;
class ThreadTest
{
public static void main(String[] args)
{
new ProduceTicketCenter(10000,"产票中心1").start();
new ProduceTicketCenter(5000,"产票中心2").start();
new ProduceTicketCenter(7000,"产票中心3").start();
try{Thread.sleep(100);}catch(Exception e){}
new SaleTicketWindow("售票窗口1").start();
new SaleTicketWindow("售票窗口2").start();
new SaleTicketWindow("售票窗口3").start();
new SaleTicketWindow("售票窗口4").start();
}
}
class SaleTicketWindow extends Thread//售票窗口
{
private static Ticket t=Ticket.getInstanceof();
private static final int MAX_TICKET=200;//每个售票窗口最多放200张票
private LinkedList<Integer> tickWin=new LinkedList<Integer>();//当前窗口的票
boolean flag=true;
SaleTicketWindow(String name){
super(name);
}
public void run(){
while(flag){
sale();
}
}
public synchronized void sale(){
if(tickWin.size()>0){
try{Thread.sleep(100);}catch(Exception e){}
int number=tickWin.removeLast();
System.out.println(Thread.currentThread().getName()+":编号为"+number+"的票被卖出！信息：");
System.out.println("姓名："+creatRandomName());
String sex=creatRandomSex();
System.out.println("性别："+sex);
System.out.println("身份证号："+creatRandomIDCard(sex));
System.out.println("编号："+Integer.toHexString(number).toUpperCase());
}else{
getTickettoWindow();
}
}
public synchronized void getTickettoWindow(){
while(t.isTickNoNull() && tickWin.size()<MAX_TICKET ){
tickWin.add(t.getTicket());
}
}
public static String creatRandomSex(){
if((int)(Math.random()*2)==1)
return "男";
else
return "女";
}
public static String creatRandomName(){
String[] firstName={"王","李","张","刘", "陈","杨","黄","赵", "周","吴","徐","孙", "马","胡","朱","郭", "何","罗","高","林",
"郑","梁","谢","唐", "许","冯","宋","韩", "邓","彭","曹","曾", "田","于","肖","潘", "袁","董","叶","杜",
"丁","蒋","程","余", "吕","魏","蔡","苏", "任","卢","沈","姜", "姚","钟","崔","陆", "谭","汪","石","付",
"贾","范","金","方", "韦","夏","廖","侯", "白","孟","邹","秦", "尹","江","熊","薛", "邱","闫","段","雷",
"季","史","陶","毛", "贺","龙","万","顾", "关","郝","孔","向", "龚","邵","钱","武", "扬","黎","汤","戴",
"严","文","常","牛", "莫","洪","米","康", "温","代","赖","施"};
if((int)(Math.random()*2)==0)
return firstName[(int)(Math.random()*112)]+(char)(Math.random()*10000+21834);
else
return firstName[(int)(Math.random()*112)]+(char)(Math.random()*10000+21834)+(char)(Math.random()*10000+21834);
}
/*
（1）前1、2位数字表示：所在省份的代码；
身份证号与省份的关系 11 北京市；12 天津市；13 河北省；14 山西省；15 内蒙古自治区；21 辽宁省；22 吉林省；23 黑龙江省；31 上海市；32 江苏省；33 浙江省；
34 安徽省；35 福建省；36 江西省；37 山东省；41 河南省；42 湖北省；43 湖南省；44 广东省；45 广西壮族自治区；46 海南省；50 重庆市；51 四川省；52 贵州省；
53 云南省；54 西藏自治区；61 陕西省；62 甘肃省；63 青海省；64 宁夏回族自治区；65 新疆维吾尔自治区；71 台湾省；81 香港特别行政区；82 澳门特别行政区
（2）第3、4位数字表示：所在城市的代码；
（3）第5、6位数字表示：所在区县的代码；
（4）第7~14位数字表示：出生年、月、日；
（5）第15、16位数字表示：所在地的派出所的代码；
（6）第17位数字表示性别：奇数表示男性，偶数表示女性；
第十八位数字的计算方法为：
1.将前面的身份证号码17位数分别乘以不同的系数。
从第一位到第十七位的系数分别为：7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2
2.将这17位数字和系数相乘的结果相加。
3.用加出来和除以11，看余数是多少？
4.余数只可能有0 1 2 3 4 5 6 7 8 9 10这11个数字。
其分别对应的最后一位身份证的号码为1 0 X 9 8 7 6 5 4 3 2。
*/
public static String creatRandomIDCard(String man){
String IDCard="";
int[] province={11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51,52,53,54,61,62,63,64,65,71,81,82};
int temp=province[(int)(Math.random()*province.length)];//省代码
IDCard+=temp;
temp=getRandomNum(1,22);//市代码，没搞不清楚，随机生成1~22.
IDCard+=addNum(temp);
temp=getRandomNum(1,30);//市代码，没搞不清楚，随机生成1~30.
IDCard+=addNum(temp);
temp=getRandomNum(1900,2060);//出生年份为1900~2060年
IDCard+=temp;
temp=getRandomNum(1,12);//月份1~12
IDCard+=addNum(temp);
temp=getRandomNum(1,30);//日1~30.
IDCard+=addNum(temp);
temp=getRandomNum(1,92);//所在地的派出所的代码，没搞不清楚，随机生成1~92.
IDCard+=addNum(temp);
if(man=="男")
temp=((int)(Math.random()*5))<<1+1;
else
temp=((int)(Math.random()*5))<<1;
IDCard+=temp;
int[] expon=new int[]{7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2};
String[] checkSheet=new String[]{"1","0","X","9","8","7","6","5","4","3","2"};
int sum=0;
for(int i=0;i<expon.length;i++)
sum+=new Integer(IDCard.charAt(i))*expon[i];
IDCard+=checkSheet[sum%11];
return IDCard;
}
private static String addNum(int num){
if(num<10)
return "0"+num;
else
return num+"";
}
private static int getRandomNum(int start,int end){
return (int)(Math.random()*(end-start+1))+start;
}
public void changeFlag(){
flag=!flag;
}
}
class ProduceTicketCenter extends Thread//产票中心
{
private static Ticket t=Ticket.getInstanceof();
boolean flag=true;
private int max;//代表当前产票中心的产票数量
private int num=0;//当前产票中心产出的票数
ProduceTicketCenter(int max,String name){
super(name);
this.max=max;
}
public void run(){
while(flag){
flag=t.ProduceTicket();
System.out.println(Thread.currentThread().getName()+":产生第"+(++num)+"张票,所有中心总共产生："+t.getTotal());
if(num>=max)
flag=false;
}
}
public void changeFlag(){
flag=!flag;
}
}
class Ticket
{
private LinkedList<Integer> tickList=new LinkedList<Integer>();
private int number=700000;//票的起始编号为70万
private final int MAX=900000;//最大票号为90万
private static Ticket t=new Ticket();
private Ticket(){}//单例设计模式
public static Ticket getInstanceof(){
return t;
}
public synchronized void printList(){
for(int num:tickList)
System.out.print(num+",");
}
public synchronized boolean ProduceTicket(){
try{Thread.sleep(20);}catch(Exception e){}
if(number<=MAX){
tickList.add(number++);
return true;
}
return false;
}
public int getTicket(){
return tickList.removeFirst();
}
public int getTotal(){
return number-700000;
}
public boolean isTickNoNull(){
if(tickList.size()>0)
return true;
else
return false;
}
}

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模拟火车票售票系统（多线程运用）

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