How this java code produces deadlock?

Question

i am going through oracle docs for deadlock.. i found this code

public class Deadlock {
    static class Friend {
        private final String name;
                 


        

Answer 1

The dealock will happen if both enters the bow() method at the same time, or during

System.out.println();

If you don't see both of the "has bowed back to me!" messages, then the deadlock occured!

If the first thread terminated before the second started there will be no deadlock.

Extend the code with Thread.sleep(1000);

public synchronized void bow(Friend bower) {
System.out.println(....);
Thread.sleep(1000);
...
}

then both threads enter bow() and dealock will occur.