Java: varargs in interface

问题

public interface MyInterface {
    public ArrayList<Double> f(ArrayList<Double>... args);
}

I get the warning: Type safety: Potential heap pollution via varargs parameter paramOfChildren. I can suppress this warning with @SuppressWarnings("unchecked").

However, in every class that implements this interface, I get this warning again. I wonder if there's a way to suppress this warning once for all the classes implementing the interface. If not, is there a good reason that we shouldn't do it?

回答1:

you can pin down the generic:

class DoubleList extends ArrayList<Double> {
    private static final long serialVersionUID = 1L;
}

interface MyInterface {
    public DoubleList f(DoubleList... args);
}

来源：https://stackoverflow.com/questions/15518302/java-varargs-in-interface