多執行緒售票問題

package com.carlinfo.bigdata;

/**
 * 多執行緒售票問題
 */
public class Ops4
{
    public static void main(String[] args)
    {
        /**
         * new一個內部類ticketTask實現Runnable，放進執行緒
         */
        TicketTask ticketTask = new TicketTask();
        Thread t1 = new Thread(ticketTask, "t1");
        Thread t2 = new Thread(ticketTask, "t2");
        t1.start();
        t2.start();
    }
}

class TicketTask implements Runnable
{
    /**
     * 總票數
     */
    int totalTicket = 10000;

    @Override
    public void run()
    {

        while (totalTicket > 0)
        {
            /**
             * 在迴圈裡面加一把鎖
             */
            synchronized (this)
            {
                if (totalTicket > 0)
                {
                    System.out.println(Thread.currentThread().getName() + "-->正在售出第" + (totalTicket--));
                }
            }
        }
    }
}