Iterate on map with multielements

Question

I have:

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

public class Second {

    public static void main(String[] args) {
        List<Map<String, String>> listOfMap = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Map<String, String> map = new HashMap<>();
            map.put("title", "title" + i);
            map.put("text", "text" + i);
            listOfMap.add(map);
        }

        for(Entry<String, HashMap> entry : listOfMap.entrySet()) {

        }

    }

}

from: Multi array/object with Java same as in PHP

but how can i iterate this? I would like show element with System.out.println, but in my code I have error:

The method entrySet() is undefined for the type List <Map<String,String>>

Then I would like to see the results this way:

title0
text0
title1
text1
title2
text2
...
title9
text9

with System.out.println.

This would be significantly easier if you used a proper class instead of a `Map`. — Louis Wasserman, Aug 21 '14 at 22:37

Eran · Accepted Answer · 2014-08-21T22:37:43.673

4

Iterate first over the list and then over each map :

for (Map<String, String> map : listOfMap) {
   for(Entry<String, String> entry : map.entrySet()) {
     System.out.println(entry.getKey());
     System.out.println(entry.getValue());
   }
}

edited Aug 21 '14 at 22:37

answered Aug 21 '14 at 22:31

Eran

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This return me error: Type mismatch: cannot convert from element type Map.Entry to Map.Entry – peksak Aug 21 '14 at 22:37
@peksak Sorry, I had a typo. Fixed now. – Eran Aug 21 '14 at 22:38

Iterate on map with multielements

1 Answers1