Java data send to flex issue

Question

This is my data structure at back-end using java,
ArrayList
          HashTable(keys, values);
          HashTable(keys, values);
but the problem is when push the data to flex this data structure will be coverd to a instance of ArrayCollection and the HashTable covered to a Object.
HashTable is out-of-order so the order of my data in flex is different every time . I use the ArrayCollection bind to the DataList component directly, and I don't want to indicate the order of each columns of  each DataList Component.How can I fix this ?
var dataSource:ArrayCollection = from Java back-end;
<mx:DataList dataProvider="{dataSource}" />
I don't want to indicate each columns like this, because I have a lot of different structure tables in SQL.
<mx:DataList dataProvider="{dataSource}" >
    <mx:DataListColumns dataField="ID" />
    <mx:DataListColumns dataField="Name" />
    <mx:DataListColumns dataField="Age" />
    <mx:DataListColumns dataField="Address" />
</mx:DataList>

Answer 1

Can you give more details about the way you talking about ?
I'm not familiar with Java.
Thanks very much.