Is Monostate the good cousin of the evil Singleton?

Question

Singleton is definitely one of the most misused and abused patterns out there. Many of us have been infected with Singletonitis at one point or another. Curiously, its close c

Answer 1

How about a class with a single instance, but without global access:

public class SingleInstance
{
    private static boolean exhausted = false;

    public SingleInstance()
    {
        if (exhausted)
        {
            throw new IllegalStateException("only one instance allowed");
        }
        exhausted = true;

        [...]
    }

    [...]
}

This avoids the problems of Singleton and MonoState, while it enforces and clearly communicates that there is only one instance.