Sorting Hashtable by value

Question

All,
I have a Hashtable with key (String) and value(float) now I want to sort it by value without disturbing the key value match
I know, it can be done by sorting the keys... and then calling get() to obtain the value for the key but I want exactly opposite..
Thanks
Vishal

Answer 1

Set set = map.entrySet();
Map.Entry[] entries = (Map.Entry[]) set.toArray(new Map.Entry[set.size()]);
Arrays.sort(entries, new Comparator() {
          public int compare(Object o1, Object o2) {
     Object v1 = ((Map.Entry) o1).getValue();
     Object v2 = ((Map.Entry) o2).getValue();
     return ((Comparable) v1).compareTo(v2);
});And how would one genericise(?) the above code snippet?
I have the following attempt but I continue to receive one unchecked warning.
Set<Map.Entry<String, String>> set = map.entrySet();
Map.Entry[] entries = set.toArray(new Map.Entry[set.size()]);
Arrays.sort(entries, new Comparatorlt;Map.Entry<String, String>>() {
            public int compare(Map.Entry<String, String> e1, Map.Entry<String, String> e2) {
            String v1 = e1.getValue();
            String v2 = e2.getValue();
            return v1.compareTo(v2);
        });