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Java Java Arrays Iteration Ye Olde Unenhanced For Loop

Posted by <noob />
<noob />
17,062 Points

A question about this video

Hi, I find the unenhanced for loop to be better when we want to output a elements index number and the element itself like?:

System.out.printf("%d : %s", i+1, something[i]

how do we even do it in the enhanced for loop?

in some cases the enhanced for loop is better and is some cases the other am i right?

Eric McKibbin

2 Answers

<noob />
<noob />
17,062 Points
<noob />
<noob />
17,062 Points

up

Eric M
Eric M
11,545 Points
Eric M
Eric M
11,545 Points

Hi noob,

You're right that you should use the loop that's more appropriate to your task and that you can't print the index with the enhanced for loop (that I'm aware of).

Generally if you don't need to work with the index directly the enhanced for loop is a better choice for iterating over a collection, but as you've pointed out that's not the only use of loops.

Cheers,

Eric

Edit: Thinking about this a bit more if you're working with an object that has an [object].IndexOf([stored-item]) method you could use that, but it's probably more expensive than just using a plain for (;;) loop.