Given:
class PingPong2 {
synchronized void hit(long n) {
for(int i = 1; i < 3; i++)
System.out.print(n + "-" + i + " ");
}
}
public class Tester implements Runnable {
static PingPong2 pp2 = new PingPong2();
public static void main(String[] args) {
new Thread(new Tester()).start();
new Thread(new Tester()).start();
}
public void run() { pp2.hit(Thread.currentThread().getId()); }
}
Which statement is true?