How do I find the number of times I've iterated through a foreach loop?

Question

If I'm trying to find the number of times I've iterated through a foreach loop in java is there a better way to do it than this?

int i = 0;
for (Button button : levelBtns) {
    button = new Button(160, 40 + (i * 50), 100, 40);
    i++;
}

I know I could just use a normal for loop and have an iterator, i, but I was just wondering if there was a more elegant way to do this with a foreach.Thanks in advance :)

EDIT: As Jon Skeet pointed out, the code above assigns the new button instance to the iteration variable. Oops. Based on other comments, I believe the most practical thing to use is a normal loop. Here's the version I'm going with. Thanks everyone for your help!

Button[] levelBtns = new Button[6];
for (int i = 0; i < levelBtns.length; i++) {
    levelBtns[i] = new Button(160, 40 + (i * 50), 100, 40);
}

I believe you have already posted the best solution. However, if you are concerned about what iteration your currently on, why not switch to a traditional for loop. — Kevin Bowersox
– Kevin Bowersox, Commented Jan 5, 2014 at 17:37
I am assuming levelBtns is an array or a Collection of some sort, therefore the number of iterations would be lvlButtons.length or lvlButtons.size() ? — Josh M
– Josh M, Commented Jan 5, 2014 at 17:39
Your code is currently pointless anyway, as you're assigning a new value to the iteration variable... which does nothing useful. — Jon Skeet
– Jon Skeet, Commented Jan 5, 2014 at 17:39

ahanin · Accepted Answer · 2014-01-05 17:41:34Z

1

If it's not an Iterable, but a Collection or array, you're iterating through, and you need the number of iterations after the loop, just use Collection.size() method or length field of an array to get the size of it, which is also the number of iterations.

answered Jan 5, 2014 at 17:41

ahanin

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VoidCatz · Accepted Answer · 2014-01-05 17:48:29Z

1

This is the best solution for a foreach-loop. Otherwise you could use something like:

for (int i = 0; i<levelBtns.lenght; i++) {
  levelBtns[i] = new Button(160, (i + 40) * 50, 100, 40);
}

edited Jan 5, 2014 at 17:48

answered Jan 5, 2014 at 17:42

VoidCatz

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1 Comment

Suresh Atta Over a year ago

OP already mentioned I know I could just use a normal for loop and have an iterator, But I believe this is the clean solution.

Suresh Atta · Accepted Answer · 2014-01-05 17:39:58Z

0

Your solution is ok and it's general. But a possible way is

You can get the counter value by getting , If it is a List then levelBtns.size() of if an array then array.length

answered Jan 5, 2014 at 17:39

Suresh Atta

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