singleton and inheritance in Java

Question

I have a base class that captures some functionality common to two classes. In other words, I can create one base class and make these two classes subclasses of that base cl

Answer 1

I'm not an expert in Java, so I don't know if this is technically legal Java code (perhaps another poster can comment):

Make the base classes inherit from a generic class Singleton.

Example:

class Singleton {

    protected Singleton(); //constructor

    private static T _instance;

}

class DerivedOne extends Singleton{

    protected DerivedOne(){} //constructor
}

class DerivedTwo extends Singleton{

    protected DerivedTwo(){} //constructor
}