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  • java 多线程的售票问题

    java 多线程的售票问题

    1. 对票的库存进行操作
    
        public class Tickets  implements Runnable{
            private int ticket = 100;
            public void run() {
                while (true) {
                    if ( ticket > 0 ) {
                        try{
                            Thread.sleep(10);
                        }catch (Exception e) {
                            e.printStackTrace();
                        }
                        System.out.println(Thread.currentThread().getName()+" 出售第 "+ticket--);
                    }
                }
            }
        }
    
    
    1. 开启多个线程同事操作票的库存
    
        public class ThDemo {
        public static void main(String[] args) {
            Tickets tickets = new Tickets();
    
            Thread t0 = new Thread(tickets);
            t0.setName("1hao");
            Thread t1 = new Thread(tickets);
            t1.setName("2hao");
            Thread t2 = new Thread(tickets);
            t2.setName("3hao");
            t0.start();
            t1.start();
            t2.start();
        }
    }
    
    
    1. 结果是库存数减到负数还可以售票, 利用同步代码块解决这个问题
    
        public class Tickets  implements Runnable{
            private int ticket = 100;
            private Object obj = new Object();
            public void run() {
                while (true) {
                    synchronized (obj) {
                        if ( ticket > 0 ) {
                            try{
                                Thread.sleep(10);
                            }catch (Exception e) {
                                e.printStackTrace();
                            }
                            System.out.println(Thread.currentThread().getName()+" 出售第 "+ticket--);
                        }
                    }
                }
            }
        }
    
    欢迎各位大虾指正
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  • 原文地址:https://www.cnblogs.com/he-zhi/p/8780638.html
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