多线程详解p6初识并发问题

public class TestThread4 implements Runnable{
    private   int ticketNum = 100;
    @Override
    public void run() {
        while (true){
            if(ticketNum<=0){
                break;
            }
            System.out.println(Thread.currentThread().getName()+"拿到了第"+ticketNum--+"张票");
        }
    }
    public static void main(String[] args) {
        TestThread4 testThread4 = new TestThread4();
        new Thread(testThread4,"小明").start();
        new Thread(testThread4,"小红").start();
    }
}