CODEWITHSUNDEEP
androidwarningshashmap
manuelBetancurt
manuelBetancurt

Reputation: 16138

android getting rid of two warnings

I am learning how to use HashMaps,

my test project is working, but i need to get rid of some warnings,

public static void main() {


    Map <String, String>mMap = new HashMap<String, String>(); //crea nuevo HashMap
    mMap.put("llave 1", "la llave uno"); //le mete cosas al hashMap
    mMap.put("llave 2", "la llave dos");
    mMap.put("llave 3", "la llave tres");
    mMap.put("llave 4", "la llave cuatro");

    Iterator iter = mMap.entrySet().iterator();

    while (iter.hasNext()) {
         Map.Entry menEntry = (Map.Entry) iter.next();

         Log.d("msg", "key:"+menEntry.getKey() +" value:"+menEntry.getValue());
    } } }

so on

Iterator iter = mMap.entrySet().iterator();

i get the warning: multiple markers at this line the autocompletition point to Iterator <E> what is this, the cast?, Error?, what to put in there?

also same warning in:

Map.Entry menEntry = (Map.Entry) iter.next();

Thanks a lot!

Upvotes: 0

Views: 88

Answers (2)

Lalit Poptani
Lalit Poptani

Reputation: 67286

Its because you are not defining the type at couple of place, that is

Iterator<Entry<String, String>> iter = mMap.entrySet().iterator();

and 

 Map.Entry<String, String> menEntry = (Map.Entry<String, String>) iter.next();

Edit

You can have a look at Generics in JAVA 1.5, here is a small explanation for that.

Upvotes: 1

Jin35
Jin35

Reputation: 8612

This warnings show that you use classes, that will be better to parameterize. use Iterator <Entry<String, String>> and Map.Entry<String, String>

Upvotes: 1

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