关于Java的问题请各位专家解答

下面是我写的帮忙看一下准不准确
package demo;

class Teacher implements Runnable {
private int notes = 80;

public void run() {
    while (true) {
        if (notes > 0) {
            System.out.println(Thread.currentThread().getName()+" "+notes--+" ");
        }
    }
}

}

public class Example12 {
public static void main(String[] args) {
Teacher t = new Teacher();
new Thread(t,"teacher1").start();
new Thread(t,"teacher2").start();
new Thread(t,"teacher3").start();
}
}

这样可能会造成线程安全问题，加锁即可解决多线程问题