How to convert HashMap to own type array?

Question

I have my hash map of type:

private HashMap<String, HashMapObject> likesYearHashMap;

where HashMapObject :

public class HashMapObject  {

private int count;
private String id;

public HashMapObject(int count, String id) {
    super();
    this.count = count;
    this.id = id;
}

}

how to convert values into my HashMap to HashMapObject [] array?

I get error of cast getting likesYearHashMap.values();

Map#values() returns a Collection. Iterate over it and add its element to your array. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Jan 13, 2014 at 15:26

Jean Logeart · Accepted Answer · 2014-01-13 15:27:52Z

2

Like this:

map.values().toArray(new HashMapObject[map.size()])

answered Jan 13, 2014 at 15:27

Jean Logeart

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NimChimpsky · Accepted Answer · 2014-01-13 15:28:00Z

1

likesYearHashMap.values().toArray (new HashMapObject[likesYearHashMap.size ()])

answered Jan 13, 2014 at 15:28

NimChimpsky

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alfo888_ibg · Accepted Answer · 2014-01-13 15:46:11Z

0

Thanks to @Vakh and @NinChimpsky i post the complete solution:

To convert into array :

HashMapObject[] array = new HashMapObject[likesYearHashMap.size()];
likesYearHashMap.values().toArray(array);

To convert to ArrayList

Collection<HashMapObject> values = likesYearHashMap.values();
ArrayList<HashMapObject> arrayList= new ArrayList<HashMapObject>(values);

edited Jan 13, 2014 at 15:46

answered Jan 13, 2014 at 15:41

alfo888_ibg

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