我应该避免在 Android 4.0+ 中为 ArrayList 使用 foreach 吗？

Question

我刚从 Hellman, Erik 的书 "Android Programming - Pushing the Limits" 中读到这篇文章。第 38 页：

void loopOne(String[] names) {
    int size = names.length;
    for (int i = 0; i < size; i++) {
        printName(names[i]);
    }
}

void loopTwo(String[] names) {
    for (String name : names) {
        printName(name);
    }
}
void loopThree(Collection<String> names) {
    for (String name : names) {
        printName(name);
    }
}
void loopFour(Collection<String> names) {
    Iterator<String> iterator = names.iterator();
    while (iterator.hasNext()) {
        printName(iterator.next());
    }
}
// Avoid using enhanced for-loops for ArrayList 
void loopFive(ArrayList<String> names) {
    int size = names.size();
    for (int i = 0; i < size; i++) {
        printName(names.get(i));
    }
}

These methods show four different ways of looping through collections and arrays. The first two methods have the same performance, so it’s safe to use the enhanced for-loop on arrays if you’re just going to read the entries. For Collection objects, you get the same performance when using the enhanced for-loop as when you manually retrieve an Iterator for traversal. The only time you should do a manual for-loop is when you have an ArrayList object.

我之前搜索过，foreach和普通的for循环在Java中没有性能差异，只有Android（版本4+）有什么特殊原因吗？

Answer 1

请检查有关循环的信息here

我应该避免在 Android 4.0+ 中为 ArrayList 使用 foreach 吗？

Should I avoid foreach for ArrayList in Andorid 4.0+?

performance

foreach

android

for-loop

arraylist