Iterating a Hashmap : Incompatible types

Question

I got a HashMap and want to iterate it. But somehow it is saying that I have incompatible types.

Required: java.util.Map.Entry <java.lang.String , java.lang.String>
 Found : java.lang.Object

Heres my code :

 Map hashmapMessagesKey = new HashMap<String,String>();
 for (Map.Entry<String, String> entry : hashmapMessagesKey.entrySet()) {

  }

Your Map is currently a raw type, use Map instead of Map. – Nevay Oct 06 '16 at 21:09 — Nevay, Oct 06 '16 at 21:09

score 2 · Answer 1 · answered Oct 06 '16 at 21:16

2

The declared type of your variable is the deciding factor, not the initialization. Your declared type is currently a raw Map-type but should be generic:

Map<String, String> hashmapMessagesKey = new HashMap<>();

Besides, depending on your use-case, the for-each method might be more readable as you can name the key and value instead of using entry.getKey() and entry.getValue():

hashmapMessagesKey.forEach((key, value) -> {
    // loop body
});

answered Oct 06 '16 at 21:16

Nevay

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I see. Imo the error code is a bit misleading. Thank you ! I will accept your Answer – Ahmet K Oct 06 '16 at 21:19

score 1 · Answer 2 · edited Oct 06 '16 at 21:15

1

Your map defination seems to be wrong.

Map<String, String> map= new HashMap<String, String>();

edited Oct 06 '16 at 21:15

Pshemo

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answered Oct 06 '16 at 21:14

Viplove Gujrathi

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Iterating a Hashmap : Incompatible types

2 Answers2