Java多线程编程，模拟售票

最新推荐文章于 2021-05-22 00:24:08 发布

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本文探讨了一个票务系统的实现，包括票数管理、并发购票处理及异常情况的处理。通过模拟购票流程，展示了如何在Java中使用同步机制确保票数的正确性和并发操作的有序性。

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packageticktester;
02class Ticket{

03    private
int ticketCount;

04     

05    public
Ticket(int 
ticketCount){

06        this.ticketCount = ticketCount;

07    }

08     

09    public
synchronized void 
withBuyTicket(int amount){

10        int
currentTicketAmount = ticketCount;

11         

12        System.out.println("\n目前票数:"+currentTicketAmount);

13        if(currentTicketAmount==0)

14        {

15            System.out.println("票已全部售出！");

16            return;

17        }

18        if(amount>currentTicketAmount)

19        {

20            System.out.println("需售出票数: "+amount+" 剩下票数为: "+currentTicketAmount+"
 剩余票数不足 !");

21        }

22        else   

23        {

24            currentTicketAmount = currentTicketAmount-amount;

25            System.out.println("售出票数:"+amount+" 剩余票数: "+currentTicketAmount);

26            ticketCount = currentTicketAmount;

27        }

28    }

29}

30 

31class BuyTicket
implements Runnable{

32    private
Ticket t;

33    private
int amount;

34     

35    public
BuyTicket(Ticket t,int 
amount){

36        this.t = t;

37        this.amount = amount;

38    }

39     

40    public
void run(){

41        try
{

42            Thread.sleep(((int)(Math.random()*10000)));

43    } 
catch (InterruptedException e) {

44            e.printStackTrace();

45    }

46        t.withBuyTicket(amount);

47    }

48}

49 

50public class
TickTester {

51 

52    /**

53     * @param args

54     */

55    public
static void 
main(String[] args) {

56        // TODO Auto-generated method stub

57        Ticket t =
new Ticket(10);

58        BuyTicket a1 =
new BuyTicket(t,2);

59        BuyTicket a2 =
new BuyTicket(t,2);

60        BuyTicket a3 =
new BuyTicket(t,1);

61        BuyTicket a4 =
new BuyTicket(t,1);

62        BuyTicket a5 =
new BuyTicket(t,2);

63        BuyTicket a6 =
new BuyTicket(t,3);

64        Thread tk1 =
new Thread(a1);

65        Thread tk2 =
new Thread(a2);

66        Thread tk3 =
new Thread(a3);

67        Thread tk4 =
new Thread(a4);

68        Thread tk5 =
new Thread(a5);

69        Thread tk6 =
new Thread(a6);

70        tk1.start();

71        tk2.start();

72        tk3.start();

73        tk4.start();

74        tk5.start();

75        tk6.start();

76    }

77}