java - 如何计算 arrayList 中的属性？

Question

所以我有一个 arrayList

 Dog spot = new Dog("Spot", "Lab","Blonde", Tail.OTTER,"Yes", 50, 3);
 Dog buddy = new Dog("Buddy", "Pit Bull", "Black", Tail.DOCKED,"Yes", 60, 2);
 Dog mia = new Dog ("Mia", "Pug", "Brown", Tail.RING ,"No", 70, 4);

现在 50、60 和 70 是狗的体重。我想将它们加起来，而不需要编写冗长的、不灵活的代码，例如:

int totalWeight = spot.weight + buddy.weight + mia.weight;

有办法做到这一点吗？

Answer 1

int totalWeight = 0;
for (final Dog dog : dogs) {
    totalWeight += dog.getWeight();
}