How to find if a thread holds lock on particular object in Java?

Question

Given string representation of an object and a list of classes. How would you determine what class that object belongs to?

Answer 1

2 ways to find if thread holds lock on object in Java

1)I thought about IllegalMonitorStateException which wait() and notify() methods throw when they get called from non-synchronized context so I said I would call newspaper.wait() and if this call throws exception it means thread in java is not holding lock, otherwise thread holds lock.

2)Another Way is that thread is a static method called holdsLock(Object obj) which returns true or false based on whether threads holds lock on object passed.