sort by value in Map in Java

gistfile1.txt

// function to sort hashmap by values 
public static HashMap<String, Integer> sortByValue(HashMap<String, Integer> hm) 
{ 
    // Create a list from elements of HashMap 
    List<Map.Entry<String, Integer> > list = 
           new LinkedList<Map.Entry<String, Integer> >(hm.entrySet()); 

    // Sort the list 
    Collections.sort(list, new Comparator<Map.Entry<String, Integer> >() { 
        public int compare(Map.Entry<String, Integer> o1,  
                           Map.Entry<String, Integer> o2) 
        { 
            return (o1.getValue()).compareTo(o2.getValue()); 
        } 
    }); 

    // put data from sorted list to hashmap  
    HashMap<String, Integer> temp = new LinkedHashMap<String, Integer>(); 
    for (Map.Entry<String, Integer> aa : list) { 
        temp.put(aa.getKey(), aa.getValue()); 
    } 
    return temp; 
}