Java deadlock question

Question

can anyone explain me why there is a deadlock in this code.Thanks

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


        

Answer 1

Here's how it probably will be executed.

1. Enter alphonse.bow(gaston);, alphonse is now locked due to synchronized keyword
2. Enter gaston.bow(alphonse);, gaston is now locked
3. Can't execute bower.bowBack(this); from first bow method call because gaston (bower) is locked. Wait for lock to be released.
4. Can't execute bower.bowBack(this); from second bow method call because alphonse (bower) is locked. Wait for lock to be released.

Both threads wait for each other to release lock.