多线程卖电影票升级

package wang1;


import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class text {
    public static void main(String[] args) {
        aaa teaned = new aaa( );

        Thread t1 = new Thread(teaned);
        Thread t2 = new Thread(teaned);
        Thread t3 = new Thread(teaned);
        Thread t4 = new Thread(teaned);
        t1.start();
        t2.start();
        t3.start();
        t4.start();


    }
}
class aaa implements Runnable{
    private int sta=100;
    Lock lock = new ReentrantLock();
    @Override
    public void run() {
        while(true){
            lock.lock();
            try{
                if(sta>0){
                    sta--;
                    System.out.println(Thread.currentThread().getName()+ "剩余票数：" + sta + "张");
                }else {
                    break;
                }
            }finally {
                lock.unlock();
            }


        }


    }

}