多线程模拟火车票售卖场景_票务处理场景模拟脚本-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_41384351/article/details/91411203

本文通过一个火车票售卖的场景，展示了如何使用Java的多线程技术来实现三个售票窗口并发操作，确保了在高并发情况下火车票数量的准确性。通过synchronized关键字保证了线程间的同步，避免了超发或错发的情况。

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一、模拟火车票售卖场景，三个窗口售卖A-B地的火车票，火车票共100张。

要求：
编号1-100 打印示例：窗口1售卖火车票66
窗口：写3个线程，


import java.util.Random;

/**
 * @auther: 巨未
 * @DATE: 2019/4/12 0012 23:18
 * @Description:
 */
class Tickets {

    private static int num = 0;

    public static synchronized int sale() {
        int i = ++num;
        return i> 100?-1:i;  //如果i>100返回-1.小于100返回i
    }
}
public class SaleTickets {
    public static void main(String[] args) {

        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void run() {
                Random random = new Random();
                int i = 0;
                while ((i = Tickets.sale()) != -1) {
                    System.out.println(Thread.currentThread().getName() + "售卖票：" + i);
                    try {
                        Thread.sleep(random.nextInt(1000));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                }
            }
        }, "窗口1");
        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                Random random = new Random();
                int i = 0;
                while ((i = Tickets.sale()) != -1) {
                    System.out.println(Thread.currentThread().getName() + "售卖票：" + i);
                    try {
                        Thread.sleep(random.nextInt(2000));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                }
            }
        }, "窗口2");
        Thread thread3 = new Thread(new Runnable() {
            @Override
            public void run() {
                Random random = new Random();
                int i = 0;
                while ((i = Tickets.sale()) != -1) {
                    System.out.println(Thread.currentThread().getName() + "售卖票：" + i);
                    try {
                        Thread.sleep(random.nextInt(2000));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                }
            }
        }, "窗口3");

        thread1.start();
        thread2.start();
        thread3.start();
        }
}