New to Java

Hi,

Is this something that is common usage/practice?:

public abstract class Base {
    private int importantPrivateVariable = setImportantPrivateVariable();
    protected abstract int setImportantPrivateVariable();
}

I would like to enforce the extender of the class to set a private variable, but as there is no abstract variable in java, I can only use a method for it.

Thanks,
lemonboston

Edit: the variable could be protected as well, I suppose this is not important here, but correct me if I am wrong