How to check how many threads are waiting for a synchronized method to become unlocked

Is there any way to check how many threads are waiting for a synchronized method to become unlocked?

I would like to know when the thread calls a synchronized method:

1) How many threads are already waiting to call the method?

2) Once the method is called how long it needed to wait for the method to become unlocked?

Solution: I solved this using stackers answer:

public class LockedClass {
    public static int count;
    public static void measuringClass() throws IOException{
        long startTime = System.currentTimeMillis();
        count++;
        System.out.println("Threads waiting="+count);
        lockedMethod(startTime);
        count--;
        System.out.println("Threads waiting="+count);
    }
    public static synchronized void lockedMethod(long startTime) throws IOException{
        System.out.println("I spent="+(System.currentTimeMillis()-startTime)+" in the queue");
        Hashtable<String, String> params = new Hashtable<String, String>();
        params.put("param1", "test");
        params.put("param2", "12345678");
        String sessionId = Common.getSession(Common.executeHttpRequest(params));
    }
}