synchronized block not locking the object reference

Question

class Demo
{
    void demo()
    {
        System.out.println(\"Inside demo of \"+Thread.currentThread().getName());
        try
        {
            Thread.sleep(10000         


        

Answer 1

The synchronization only occurs in Thread1. Since Thread2 does not synchronize on d, it is allowed to invoke demo() while Thread1 holds the lock.

You seem to be misunderstanding the use of synchronized. Synchronization only occurs with other threads trying to enter a synchronized block of the common object.