Can one do a for each loop in java in reverse orde

Question

I need to run through a List in reverse order using Java.

So where this does it forwards:

for(String string: stringList){
//...do something
}

Is there some way to iterate the stringList in reverse order using the for each syntax?

For clarity: I know how to iterate a list in reverse order but would like to know (for curiosity's sake ) how to do it in the for each style.

Answer 1

For a list, you could use the Google Guava Library:

for (String item : Lists.reverse(stringList))
{
    // ...
}

Note that Lists.reverse doesn't reverse the whole collection, or do anything like it - it just allows iteration and random access, in the reverse order. This is more efficient than reversing the collection first.

To reverse an arbitrary iterable, you'd have to read it all and then "replay" it backwards.

(If you're not already using it, I'd thoroughly recommend you have a look at the Guava. It's great stuff.)