HashMap < String , HashMap > selects = new HashMap < String , HashMap >(); for ( Map . Entry < String , HashMap > entry : selects . entrySet ()) { String key = entry . getKey (); HashMap value = entry . getValue (); // do what you have to do here // In your case, an other loop. } How to loop a Map in Java - Mkyong.com https://www.mkyong.com/java/how-to-loop-a-map-in-java/ 25 Jun 2010 - Map map = new HashMap (); map.put("1", "Jan"); ... getValue()); } //Java 8 only, forEach and Lambda map. 4 example to Iterate over HashMap, Hashtable or any Map in Java javarevisited.blogspot.com/.../how-to-traverse-or-loop-hashma... There are multiple way to iterate, traverse or loop through Map, HashMap or TreeMap in Java and we all familiar of either all of those or some of those. But to my ... How to Iterate Over a Map in Java www.sergiy.ca/how-to-iterate-over-a-map-in-java/ Since all maps in Java implement Map interface...