turn a Set into a indexed List?

[Holmes Wong]

Hi,
I need to use a list (or collection) to display data on
jsp page. Is there any fats way to trun a Set into an indexed Collection
or List? (Can get individual element using get(index))
thanks,

[Phil Chuang]

Since a Set is a Collection, you should be able to do this:

List list = new ArrayList (someSet);

But instead of doing all that, why don't you just use an iterator?

for (Iterator i = someSet.iterator(); i.hasNext() :wink: 
{
    Object someObject = i.next();
    // display
}

[ October 07, 2003: Message edited by: Phil Chuang ]

[Jim Yingst]

List list = new ArrayList(set);
The order of the list will be whatever order the set had. For a TreeSet, this means either natural order, or order determined by the Comparator; for HashSet, well... just pretend it's random. (HashSet order is based on hashCode() and capacity, but the exact algorithm is not specified, so it's best to make no assumptions.)

[Holmes Wong]

thanks, Jim. This may be what I want. I will try it out.
QUOTE]Originally posted by Jim Yingst:
List list = new ArrayList(set);
The order of the list will be whatever order the set had. For a TreeSet, this means either natural order, or order determined by the Comparator; for HashSet, well... just pretend it's random. (HashSet order is based on hashCode() and capacity, but the exact algorithm is not specified, so it's best to make no assumptions.)