Question

you have two LinkedHashMaps

Map m1 = new LinkedHashMap();
m1.put("1","One");
m1.put("3","Three");
Map m2 = new LinkedHashMap();
m2.put("2","Two");
m2.put("4","Four");

Find keys from both the Linked HashMap and store it in a list alternatively.

The list should contain 1,2,3,4.

Answer 1

This is solution:

        List list = new ArrayList();
        list.addAll(m1.keySet());
        list.addAll(m2.keySet());
        Collections.sort(list);