how to sort a Fraction part of Float Map in Java

Question

I jave a map containing String as Key and float as value in java. How to sort them efficiently. I tried to use comparator , but stuck badly.

Map<String,Float> map = new HashMap<String,Float>();
map.put("A",(float)3.24);
map.put("A",(float)3.14);

Sorry my problem is to sort based on fractional part of the value ie .24 and .14

How to sort the above in java.

How do you want them sorted? And in what way did you get *"stuck"* when using a custom comparator? — Hunter McMillen, Dec 10 '13 at 15:56
http://stackoverflow.com/questions/922528/how-to-sort-map-values-by-key-in-java or http://stackoverflow.com/questions/109383/how-to-sort-a-mapkey-value-on-the-values-in-java — Rafael Winterhalter, Dec 10 '13 at 15:57

score 2 · Answer 1 · answered Dec 10 '13 at 15:57

2

If you want them ordered by key, use a Treemap instead of a Hashmap.

answered Dec 10 '13 at 15:57

BillRobertson42

score 2 · Answer 2 · answered Dec 10 '13 at 15:57

2

Use TreeMap instead of HashMap. TreeMap will automatically sorted.

Note: HashMap, TreeMap wont allow duplicate keys.

answered Dec 10 '13 at 15:57

score 0 · Answer 3 · answered Dec 10 '13 at 16:01

0

answered Dec 10 '13 at 16:01

user2084446

3 Answers3