What is the purpose of passing parameter to synchronized block?

What is the purpose of passing parameter to synchronized block?

java multithreading synchronization synchronized-block

multithreading

It is better to have a synchronized block inside a try block or a try block inside a synchronized block?

java multithreading try-catch synchronized-block

multithreading

Synchronized block not working

java multithreading synchronized-block

multithreading

Concurrency in Java using synchronized blocks not giving expected results

java multithreading concurrency synchronized synchronized-block

multithreading