Any null safe alternative to ArrayList.addAll?

Question

I was refactoring some old code of mine that I\'ve written and I stumbeled on this code:

    List fullImagePool = new ArrayList<>();
           


        

Answer 1

Just write a small utility method:

public static  void addAllIfNotNull(List list, Collection c) {
    if (c != null) {
        list.addAll(c);
    }
}

so that you can write:

List fullImagePool = new ArrayList<>();
addAllIfNotNull(fullImagePool, style.getTestMH());
addAllIfNotNull(fullImagePool, style.getTrousers());
addAllIfNotNull(fullImagePool, style.getDetailRevers());
// ...etc