how to print the index number of elements in the ArrayList using for each looping

Question

Can anybody tell me how to print the index number of elements in the ArrayList using for each looping in Java.

Answer 1

By keeping a separate index count:

int index=0;
for(String s : list){
    System.out.println(String.valueOf(index++)+": "+s);
}

Probably makes more sense to use a regular for loop instead. The "enhanced for loop" is based on the Iterable and Iterator interfaces - it doesn't know anything about implementation details of the underlying collection (which may well not have an index for each element).

Answer 2

like @Michael's but shorter. A pet obsession I'll admit.

List<String> list = Arrays.asList("zero", "one", "two", "three");
int index=0;
for(String s : list)
    System.out.println((index++)+": "+s);

prints

0: zero
1: one
2: two
3: three