How to loop through ALL content of HashMap

Question

How to loop through ALL content of HashMap? I only get last put

   ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();

// 0
    HashMap<String, String> map = new HashMap<String, String>();
    map.put("name", "name0");
    map.put("company", "company0");
    list.add(map);
// 1
    map = new HashMap<String, String>();
    map.put("name", "name1");
    map.put("company", "company1");
    list.add(map);


    for (String key : map.keySet()) {
        String value = map.get(key);
        Log.w("dd:", "Key = " + key + ", Value = " + value);
    }

I only get last put:

Key = company, Value = company1
Key = name, Value = name1

You are overwriting your values for the same keys `name` and `company`. Perhaps you want a multi-map with `Set` values? — javabrett, Jun 12 '15 at 21:27

score 6 · Answer 1 · answered Jun 12 '15 at 21:01

6

You have multiple maps in a list. You need to loop over the list, then loop over the map inside the list.

for(HashMap<String, String> curMap : list) {
    //Put your loop over the map here.
}

answered Jun 12 '15 at 21:01

Gabe Sechan

84,451
9
82
121

Thanks a lot!! I treated it as one one map with indexes. – Alex Burton Jun 12 '15 at 21:07

score 0 · Answer 2 · answered Jun 12 '15 at 21:07

0

Iterate over list first and then over map.

for(Map<String, String> myMap: list){
    for (Map.Entry<String, String> entry : myMap.entrySet()){
           Log.w("dd:", "Key = " + entry.getKey() + ", Value = " +             
              entry.getValue());
          }
}

answered Jun 12 '15 at 21:07

Arpit Aggarwal

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14
83
102

Arpit? Do you know Alex Burton? – Milche Patern Jun 13 '15 at 05:14

How to loop through ALL content of HashMap

2 Answers2