CODEWITHSUNDEEP
javahashmapsublist
AkiraYamaokaNC
AkiraYamaokaNC

Reputation: 360

Map with HashMap inside sublist

How I can get sublist from? 

Map<String, HashMap<String, String>>

I have tried: 

Collections.list(Collections.enumeration(myMap.values())).subList(from,too)

UPD: Method returns List<HashMap<String, String>> only. But I need List<String, HashMap<String,String>>

Upvotes: 0

Views: 872

Answers (2)

Ed Staub
Ed Staub

Reputation: 15690

You probably want to use Map.entrySet(), not Map.values(). It will provide a set of key-value pairs, which is what you want.

If you are expecting the entries to be in the order you inserted them with, use LinkedHashMap instead of HashMap.

Also, unimportantly, consider getting rid of the enumeration, and just use new ArrayList(myMap.entrySet()).

Upvotes: 2

wonhee
wonhee

Reputation: 1661

If you are seeing NullPointerException, then Check if your "myMap" has properly initialized and have at least not empty.

If you are seeing IndexOutOfRangeException, then Two arguments "from" and "to" should be in the range of map size. from >= 0 to <= map's max size

Upvotes: 1

Related Questions