How can I ensure that an overridden method is synchronized

Question

I have a class of common code that is thread safe.

One of the methods in that class is abstract and needs to be overridden for different implementations.

I need

Answer 1

From Synchronized method in subclass

Synchronized is the implemenation detail of a method. You can override a sync method with a method without declaring that as sync and vice versa. The same holds true for the overloading also.

You can also have a look at, A synchronized method in the superclass acquires the same lock as one in the subclass.