I want to loop through hashmap and call the method of object in it

Question

I have a hashmap with 2 objects, Parcel and Deliverer. Both have a getName function. I want to loop the hashmap and print there names like (Parcel.getName(), Deliverer.getName()).

for (Map.Entry<Parcel, Deliverer> entry : deliveryList.entrySet()) {
                for (Parcel key: entry) {
                    System.out.println("Package : " + key.getName());
                    for (Deliverer deliverer: entry) {
                        System.out.println("- Deliverer : " + deliverer.getName());
                        continue;
                    }
                }
            }

See if this helps? https://stackoverflow.com/questions/1066589/iterate-through-a-hashmap — jared, Nov 01 '19 at 09:40

score 3 · Answer 1 · answered Nov 01 '19 at 09:55

Not any different from @funkyjelly. An upvote :)

Same thing, just with Java8 collection foreach syntax.

deliveryList.entrySet().forEach( entry -> 
           System.out.println("Package : " + entry.getKey().getName());
           System.out.println("Deliverer: " + entry.getValue().getName());
);

score 3 · Accepted Answer · answered Nov 01 '19 at 13:05

3

Another way can be using passing BiConsumer to forEach directly

deliveryList.forEach((key, value) -> System.out.println("Package: " + key.getName() + "- Deliver: " + value.getName()))

answered Nov 01 '19 at 13:05

Deb

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nullPointer · Answer 3 · 2019-11-01T09:51:07.063

2

Once you have the map entries you'd only need to invoke getKey() to get Parcel and getValue() to get Deliverer for each entry. Hence it should be like this :

for (Map.Entry<Parcel, Deliverer> entry : deliveryList.entrySet()) {
    System.out.println("Package : " + entry.getKey().getName() + 
          "- Deliverer : " + entry.getValue().getName());
}

edited Nov 01 '19 at 09:51

answered Nov 01 '19 at 09:45

nullPointer

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I want to loop through hashmap and call the method of object in it

3 Answers3