Problems converting Array of objects to ArrayList

The ArrayList(Collection) constructor you are using here in the part where you write new ArrayList(Arrays.asList(trustSummary)); creates an ArrayList with the elements from the source collection, it does not create an ArrayList with another collection as element.

So you need either to fix that line, or change the line

ArrayList row = (ArrayList) rows.next();

to

TrustSummary ts = (TrustSummary) rows.next();

Generally I would advise using generics, to avoid that sort of confusion regarding a collection's types.

In your case that would either be for example

List<TrustSummary> summaries = new ArrayList<TrustSummary>(Arrays.asList(trustSummary));

Your code would only work if trustSummary is:

ArrayList[] trustSummary;

or: (though this doesn't really make sense, because then the array would only have 1 element, thus you may as well work with the element directly)

ArrayList trustSummary;

Both of the above works because Arrays.asList takes either an array or a bunch of items you want in the array as parameters.

The reason trustSummary needs to be defined as above (with ArrayList being the elements) is because the iterator grabs the elements one at a time from data (which was converted from the array) (so the return type of next() is the type used in the array (ArrayList in this case)).

This would work:

String[] trustSummary = {"1", "2", "3"};
ArrayList<String> data = new ArrayList<String>(Arrays.asList(trustSummary));
for (Iterator rows = data.iterator(); rows.hasNext();)
  System.out.println((String)rows.next());

Or this:

String trustSummary = "1";
ArrayList<String> data = new ArrayList<String>(Arrays.asList(trustSummary));
for (Iterator rows = data.iterator(); rows.hasNext();)
  System.out.println((String)rows.next());

Replace String with the desired type and change appropriately.

for (Iterator rows = data.iterator(); rows.hasNext();) 
{
    Map.Entry entry = (Map.Entry) rows.next();
    ArrayList row = (ArrayList) entry.getValue(); 
}