功能实现：多线程模拟售票系统

定义一个车票类，车票类拥有票号属性、  车票状态(未售、售出)属性和拥有者(String类型)属性；在主线程中定义一个票库(ArrayList数组列表)初始化票库并生产200张票；

定义一个乘客类继承自线程类，有一个名字(String类型)属性， 乘客类每隔10毫秒就去票库中查看有没票，如果有票就抢一张过来 (把车票标为售出状态，并把车票的拥有者标为自己的名字)， 每个乘客抢到20张票就停止运行。

在主线程中创建10个乘客类并启动它们(开始抢票)， 要求每个乘客抢到的票不连号，不能多抢或少抢。抢完后打印出每个人抢到的票号。

代码实现部分：

import java.util.ArrayList;

public class Main {

static ArrayList mTicketList = new ArrayList();//票库

public static void main(String[] args) {

for(int i=0;i<200;i++){

Ticket t = new Ticket();

t.ticketNum = i + 100;

mTicketList.add(t);

}

Passenger[] passengers = new Passenger[10];

for(int i=0;i<10;i++){

passengers[i] = new Passenger("passenger_"+i/*,mTicketList*/);

passengers[i].start();

}

//等待所有乘客结束

for(int i=0;i<10;i++){

try {

passengers[i].join();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

for(int i=0;i

System.out.print(passengers[i].name+"抢到的票:");

int tCnt = 0; //抢到的票数

for(int j=0;j

Ticket t = mTicketList.get(j);

if(t != null && t.owner != null && passengers[i] != null){

if(t.owner.equals( passengers[i].name)){

tCnt++;

System.out.print(t.ticketNum+",");

}

}

}

System.out.println("总票数："+tCnt);

}

}

}

import java.util.ArrayList;

public class Passenger extends Thread {

String name;//名字

//ArrayList mTicketList ;

int myTickets = 0;

public Passenger(String name/*,ArrayList ticketList*/){

//mTicketList = ticketList;

this.name = name;

}

@Override

public void run() {

//Main.mTicketList.get(0);

while(myTickets<20){

//开始抢票

for(int i=0;i

Ticket t = Main.mTicketList.get(i); //取出第i张票

synchronized (t) { //synchronized (监视的竞争对象)

if(t.saledState == Ticket.STATE_NOT_SALED){

t.saledState = Ticket.STATE_SALED; //把车票标为售出状态

t.owner = this.name; //把车票的拥有者标为自己的名字

myTickets++;

System.out.println(this.name +"抢到"+t.ticketNum+"号票");

break;

}

}

/*

boolean result = checkTicket(t);

if(result){

break;

}*/

}

try {

sleep(10);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

/*

* synchronized 默认监视的竞争对象　：　为当前类对象，即this

*/

public synchronized boolean checkTicket(Ticket t){

if(t.saledState == Ticket.STATE_NOT_SALED){

t.saledState = Ticket.STATE_SALED; //把车票标为售出状态

t.owner = this.name; //把车票的拥有者标为自己的名字

myTickets++;

System.out.println(this.name +"抢到"+t.ticketNum+"号票");

return true;

}

return false;

}

}

public class Ticket {

public static final boolean STATE_SALED = true; //售出状态

public static final boolean STATE_NOT_SALED = false;//未售出状态

public int ticketNum = 0; //票号

public boolean saledState = STATE_NOT_SALED;//车票状态

public String owner = null; //拥有者

}