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Is it convenient to use java.lang.Void for classes that doesn't return anything?


I would definitely do something like this to avoid exposing something that doesn't have to be:

public interface Operation<V> {
    V run();
    public int getService();
}

abstract public class VoidOperation implements
Operation<Void> {

    public final Void run() {
        runVoid();
        return null;
    }

    abstract public void runVoid();

    abstract public int getService();
}

Usage :

    new Operation<String>() {
        public String run() {
          return null;
        }
        public int getService() { return 1; }
    };

    new VoidOperation() {
        public void runVoid() {
        }
        public int getService() { return 1; }
    };

Categories : Java

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