How does primitive array work with new for each loop in Java?

Question

I understand that new for each loop works with Iterable and arrays, but I don\'t know what goes behind the scenes when working with arrays.

Can anyone help me under

Answer 1

This is the equivalent to:

final int len = number.length;
for(int j = 0; j < len; j++) {
  int i = number[j];
}

Note that the forEach will not evaluate the .length in each loop. This might be also be eliminated by the JVM, but especially in case of collections, where some would use

for(int j = 0; j < collection.size(); j++) {

it makes a (small) difference to the faster

int len = collection.size()
for(int j = 0; j < len; j++) {