Question

I have read that

    for (int i1 : A) {
    }

is better than

    for (int i1=0; i1 < A.length; i++) {
    }

but if I want to access index value in first one is there any mean or should I use the second one only.

Answer 1

Wikipedia states:

foreach loops usually maintain no explicit counter: they essentially say “do this to everything in this set”, rather than “do this x times”. This avoids potential off-by-one errors and makes code simpler to read.

If you want to use index, it’s better to use latter version.

if I want to access index value in first one is there any mean

Yes, you can

int index = 0;
for (int i1 : A) 
{
    // Your logic
    // index++;
}

but again, not recommended. if you need index in Enahanced for loop, rethink your logic.

Java recommends the enahanced for loop: Source (See last line on page)