Inheriting static variable from abstract class

Question

I have half a dozen classes which all extend the same abstract class. The abstract class has a static variable pointing to some JNI code that I only want to load once per in

Answer 1

I have a similar problem. Looks like Java can't isolate static members (attributes). I ended up adding an abstract method instead of the attribute:

public abstract class Abs {
    public void printX() {
        System.out.println("For " + this.getClass() + " x=" + getX());
    }

    protected abstract Integer getX();

}

public class A extends Abs {
    protected static Integer x = 1;

    @Override
    protected Integer getX() {
        return x;
    }

}

public class B extends Abs {
    protected static Integer x = 2;

    @Override
    protected Integer getX() {
        return x;
    }

}

public class test {

    public static void main(String args[]) {
        Abs a = new A();
        a.printX();
        Abs b = new B();
        b.printX();
        Abs c = new A();
        a.printX();
        b.printX();
        c.printX();

    }
}