线程安全方式03---Lock锁

/**
 * 线程安全---Lock方式
 *
 * @Author: ITYW
 * @Create 2020 - 10 - 26 - 19:16
 */
public class RunnableSecurity_Lock {
    public static void main(String[] args) {
        Runnable_Lock runnable_lock = new Runnable_Lock();
        Thread t1 = new Thread(runnable_lock);
        Thread t2 = new Thread(runnable_lock);
        Thread t3 = new Thread(runnable_lock);

        t1.setName("window01");
        t2.setName("window02");
        t3.setName("window03");

        t1.start();
        t2.start();
        t3.start();
    }
}
class Runnable_Lock implements Runnable{
    private static int ticket = 100;
    private ReentrantLock lock = new ReentrantLock();
    @Override
    public void run() {
        while (true){
            try {
                lock.lock();
                if (ticket > 0){
                    try {
                        Thread.sleep(200);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName()+"卖出了第"+ticket+"张");
                    ticket--;
                }else {
                    break;
                }
            } finally {
                lock.unlock();
            }
        }
    }
}