I want to populate a drop down box. I fire a query with order by clause. Get list of type List<object> in proper order. I prepare Map<String,String> from the list. And populate the drop down from map using ajax(dwr). but drop down has different order, actually unordered. I tried printing Map and found that it didn't preserve the order in which I have inserted the elements. So is there any way through which I can preserve the order?