Sorting LinkedHashMap

java linkedhashmap
Ramin picture Ramin · Aug 29, 2012 · Viewed 68.9k times · Source

How can I sort a LinkedHashMap based on its values given that the LinkedHashMap contains of String and Integer. So I need to sort it based on the Values which are Integers. Thanks a lot

Answer

Louis Wasserman picture Louis Wasserman · Aug 29, 2012 
List<Map.Entry<String, Integer>> entries =
  new ArrayList<Map.Entry<String, Integer>>(map.entrySet());
Collections.sort(entries, new Comparator<Map.Entry<String, Integer>>() {
  public int compare(Map.Entry<String, Integer> a, Map.Entry<String, Integer> b){
    return a.getValue().compareTo(b.getValue());
  }
});
Map<String, Integer> sortedMap = new LinkedHashMap<String, Integer>();
for (Map.Entry<String, Integer> entry : entries) {
  sortedMap.put(entry.getKey(), entry.getValue());
}

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