Which is the best way to use generics to write an abstract base class or an Interface for a Singleton?
I've many lazy created singletons in my code. Lazy means they create themself when the first user class declares the singleton class. It looks like this:
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| public class TheSingelton
{
private static TheSingelton sInstance = new TheSingelton();
private TheSingelton()
{}
public static TheSingelton getInstance() {
return sInstance;
} |
The con is that for every class which wants to be a Singleton it has to double these lines with its own type.
In C++ I used to use templates for these kind of things. I guess with generics we finally can have a real Singleton base abstract class or Interface in Java, too?
(I'd prefer an abstract class because even the sInstance shall be inside the base class, not in the derivate.)
