Question

I have this following loop and I want to run it for just one time.
how can I do that?

for (AnnotationData annotations : annotation)

Answer 1

Just break out!

for (AnnotationData annotation : annotations) {
    // do something with "annotation"
    break; // only execute loop body once
}

Other answers are using counters or flags!? It never ceases to amaze me just how much code some people write to do the simplest of things. Typically, the more inferior the programmer, the more code they write.

Edited:

There is a misunderstanding by some commenters that a non-loop version would use “less code” or “less lines”. Such claims are untrue… here is the precise non-loop equivalent code:

if (!annotations.isEmpty()) {
    AnnotationData annotation = annotations.get(0);
    // do something with "annotation"
}

This uses the same number of lines, but requires 23 more characters of code, although I grant you its intention is more emphatic.