多线程《多线程操作同一变量》_多线程操作变量-优快云博客

本文介绍了一个使用Java实现的多线程同步卖票程序案例。通过synchronized关键字确保了线程安全，两个线程Window1和Window2并发执行，共同操作同一个票数变量ticketCount，演示了如何防止竞态条件并正确地进行资源同步。

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【代码说明】

两个线程“Window1”和“Window2”操作同一变量ticketCount(卖票)。

【代码示例】

1、MyThread.java

package com.wcs.java.thread;


public class MyThread implements Runnable{
    
    private int ticketCount;
    
    public MyThread(int ticketCount) {
        this.ticketCount = ticketCount;
    } 
    
    public synchronized int sellTicket() {
        return --ticketCount;
    }

    @Override
    public void run() {
        while(ticketCount > 0) {
            System.out.println(Thread.currentThread().getName() + " sell one ticket,remainder ticket count is : " + sellTicket());
        }
    }

}

2、TestMyThread.java

package com.wcs.java.thread;


public class TestMyThread {

    public static void main(String[] args) {
        MyThread myThread = new MyThread(10);
        Thread t1 = new Thread(myThread, "Window 1");
        Thread t2 = new Thread(myThread, "Window 2");
        t1.start();
        t2.start();
    }

}

【运行结果】

Window 1 sell one ticket,remainder ticket count is : 9
Window 1 sell one ticket,remainder ticket count is : 7
Window 1 sell one ticket,remainder ticket count is : 6
Window 2 sell one ticket,remainder ticket count is : 8
Window 2 sell one ticket,remainder ticket count is : 4
Window 2 sell one ticket,remainder ticket count is : 3
Window 2 sell one ticket,remainder ticket count is : 2
Window 2 sell one ticket,remainder ticket count is : 1
Window 2 sell one ticket,remainder ticket count is : 0
Window 1 sell one ticket,remainder ticket count is : 5