Short variant of generate parameters in for cycle in case of hashmap

Question

I am using HashMap and have found an example of using compact type of FOR

Map<String, Integer> hashMap = new HashMap<>();

hashMap.put("one", 5);
    hashMap.put("two", 8);
    hashMap.put("three", 12);
    hashMap.put("four", 5);

    Set<Map.Entry<String, Integer>> set = hashMap.entrySet();

    for (Map.Entry<String, Integer> me : set) {
    System.out.print(me.getKey() + ": ");
    System.out.println(me.getValue());
    }

And i cant find an answer how does people use short variant of writing cycle FOR and how do they generate parameters for that. I mean this line

for (Map.Entry<String, Integer> me : set)

Your code runs, is correct, etc. What is your actual question? — Tim Biegeleisen, Aug 10 '17 at 01:48
*how does people use short variant of writing cycle FOR and how do they generate parameters for that.* What??? — shmosel, Aug 10 '17 at 01:50
@TimBiegeleisen what does "Map.Entry me" means. How did we generate it? And where did we get "me"? — Bo Z, Aug 10 '17 at 01:56
In this context `me` is just a dummy variable which will hold each map entry as you iterate over the set, that is all. — Tim Biegeleisen, Aug 10 '17 at 01:58
@TimBiegeleisen do i understand right that in the left part of " : " we make something which will save something which we put on the right side of the " ; " ??? — Bo Z, Aug 10 '17 at 01:59
see [for-each](https://stackoverflow.com/questions/85190/how-does-the-java-for-each-loop-work) — Scary Wombat, Aug 10 '17 at 02:00
@ScaryWombat Thank you great man. And Tim thank you too for help — Bo Z, Aug 10 '17 at 02:03

score 0 · Accepted Answer · answered Aug 10 '17 at 02:09

When we use short type of cycle For in example

String[] fruits = new String[] { "Orange", "Apple", "Pear", "Strawberry" };

    for (String fruit : fruits) {
    // fruit is an element of the `fruits` array.
    }

String fruit - is variable ( on the left of ":" )

fruits is an object where all our elements saved ( on the right of ":" )

Short variant of generate parameters in for cycle in case of hashmap

1 Answers1