Can the new for loop in Java be used with two variables?

Question

We can use the old for loop (for(i = 0, j = 0; i<30; i++,j++)) with two variables Can we use the for-each loop (or the enhanced for loop) in java (for(Item item : items) with two variables? What's the syntax for that?

Answer 1

The following should have the same (performance) effect that you are trying to achieve:

List<Item> aItems = new List<Item>();
List<Item> bItems = new List<Item>();
...
Iterator aIterator = aItems.iterator();
Iterator bIterator = bItems.iterator();
while (aIterator.hasNext() && bIterator.hasNext()) {
    Item aItem = aIterator.next();
    Item bItem = bIterator.next();
}

Answer 2

Unfortunately, Java supports only a rudimentary foreach loop, called the enhanced for loop. Other languages, especially FP ones like Scala, support a construct known as list comprehension (Scala calls it for comprehension) which allows nested iterations, as well as filtering of elements along the way.