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  • Java 多线程示例

    /**
     * 多线程案例 两种方式  模拟买票程序(不考虑线程安全问题)
     */
    public class ThreadTest {
        public static void main(String[] args) {
            System.out.println(Thread.currentThread().getName() + " main run start");
    
            //方式1
            /**
             * 模拟4个售票窗口售票
             */
            // Ticket test1 = new Ticket();
            // Ticket test2 = new Ticket();
            // Ticket test3 = new Ticket();
            // Ticket test4 = new Ticket();
            // test1.start();
            // test2.start();
            // test3.start();
            // test4.start();
    
            //方式2
            TestImpl ti1 = new TestImpl();
            TestImpl ti2 = new TestImpl();
            TestImpl ti3 = new TestImpl();
            TestImpl ti4 = new TestImpl();
            new Thread(ti1).start();
            new Thread(ti2).start();
            new Thread(ti3).start();
            new Thread(ti4).start();
    
    
            System.out.println(Thread.currentThread().getName() + " main run finished");
        }
    }
    
    /**
     * 方式1 继承Thread类重写run方法
     */
    class Ticket extends Thread {
        private static int ticketCount = 100;
    
        @Override
        public void run() {
            while (ticketCount > 0) {
                System.out.println(Thread.currentThread().getName() + " extends run tickNum" + ticketCount--);
            }
        }
    }
    
    /**
     * 方式1 实现Runnable接口
     */
    class TestImpl implements Runnable {
        private Object obj = new Object();
        private static int ticketCount = 100;
    
        @Override
        public void run() {
            while (ticketCount > 0) {
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                sale();
            }
        }
    
        /**
         * 使用同步代码块解决多线程安全问题
         */
        public void sale() {
            synchronized (this) {
                if (ticketCount > 0) {
                    System.out.println(Thread.currentThread().getName() + "还剩" + (ticketCount) + "张票");
                    ticketCount--;
                }
            }
        }
    }
    

      

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  • 原文地址:https://www.cnblogs.com/smartsmile/p/11605270.html
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