Speaks anything against this Singleton implementation?

[Darya Akbari]

    
public class Singleton {
    private static Singleton uniqueInstance = new Singleton();

    private Singleton() {}

    public static Singleton getInstance() {
        return uniqueInstance;
    }
}

[Eduardo Bueno]

Structured programming.

this article still makes much sense today.

[Ilja Preuss]

The only thing that speaks against this implementation is that you likely shouldn't be using a Singleton at all.