Java reverse foreach [duplicate]

Question

Possible Duplicate:
Can one do a for each loop in java in reverse order?

For a forward iteration:

for (int i=0; i<pathElements.length; i++){
    T pathElem = pathElements[i];
    .......
}

I can code it as a foreach:

for(T pathElem : pathElements){
    .......
}

Is there a switch so that a foreach could iterate in reverse?

for (int i=pathElements.length-1; i>=0; i--){
    T pathElem = pathElements[i];
    .......
}

Is there a reverse iteration switch in foreach?

(If not, don't you think it would be an exciting idea that JDK 8, 9, etc, includes this feature?)

Answer 1

It's fundamentally impossible because the foreach loop is based on the Iterable and Iterator interfaces, and those don't have a notion of reverse iteration.

Answer 2

Using Guava:

for (T elem : Lists.reverse(Arrays.asList(array))) {
  ...
}

iterates over a reversed view of the array as a list. (So there's only a constant overhead, and you don't change the underlying array.)