Singleton pattern - Does early binding (with static variables involved) diminish the need of mutex locks?

Question

They say that early binding solves the problem of synchronization. I couldn't understand "how". Is this something special to Java or the same applies to C++ too?

so, with this method we actually won't require a mutex lock?

Answer 1

The JVM ensures that each class is fully loaded before allowing any access to it via other threads. This means that all static variables, including uniqueInstance above, at fully instantiated before they can be accessed. This is specific to Java and means you don't need synchronization to protect the publication of the instance.