编写三各类Ticket、SaleWindow、TicketSaleCenter分别代表票信息、售票窗口、售票中心。 售票中心分配一定数量的票，由若干个售票窗口进行出售，利用你所学的线程知识来模拟此售票过程。

package com.swift;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class TicketSaleCenter {

    public static void main(String[] args) {
        /*
         * 第6题: 编写三各类Ticket、SaleWindow、TicketSaleCenter分别代表票信息、售票窗口、售票中心。   
         * * 售票中心分配一定数量的票，由若干个售票窗口进行出售，利用你所学的线程知识来模拟此售票过程。
         */
        Ticket tic = new Ticket();
        tic.setTotal_num(1000);
        SaleWindow win = new SaleWindow(tic);
        Thread t1 = new Thread(win, "售票窗1");
        Thread t2 = new Thread(win, "售票窗2");
        Thread t3 = new Thread(win, "售票窗3");
        t1.start();
        t2.start();
        t3.start();
    }

}

class Ticket {

    private int total_num;
    private int sold_num;

    public int getTotal_num() {
        return total_num;
    }

    public void setTotal_num(int total_num) {
        this.total_num = total_num;
    }

    public int getSold_num() {
        return sold_num;
    }

    public void setSold_num(int sold_num) {
        this.sold_num = sold_num;
    }

}

class SaleWindow implements Runnable {

    private Ticket tic;

    public Ticket getTic() {
        return tic;
    }

    public void setTic(Ticket tic) {
        this.tic = tic;
    }

    public SaleWindow(Ticket tic) {
        super();
        this.tic = tic;
    }

    @Override
    public void run() {
        while (true) {
            synchronized ("锁") {
                int totalNum = tic.getTotal_num();
                int soldNum = tic.getSold_num();
                if (totalNum > 0) {
                    totalNum--;
                    tic.setTotal_num(totalNum);
                    soldNum++;
                    tic.setSold_num(soldNum);
                    System.out.println(Thread.currentThread().getName() + " 已卖出第 " + tic.getSold_num() + " 张票，"
                            + "剩余的票数是 " + tic.getTotal_num());
                }
            }
        }
    }

}