Re: Way to sort / enforce order for Map.entrySet?

From:

Lew <lew@lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 23 Apr 2010 07:26:11 -0700 (PDT)

Message-ID:

<bf01807b-00fa-4d14-a4bc-cb544129618f@k41g2000yqf.googlegroups.com>

laredotornado wrote:

Does anyone know how to sort a map.entrySet by the value? Each entry

Custom Comparator. Load the entries into a SortedSet with that
Comparator.

is an Integer mapped to a String, but I wish to have the whole thing
sorted alphabetically by the strings. Any ideas how I can do this?
Below is the function that ultimately serves up the map.entrySet.
(The Map[] object is a list returned from a database).

The 'Map[]' object is an unholy moreau of array and raw 'Map'. Ewwww.

    @ModelAttribute("promoEntryTypes")
    public Set<Map.Entry<String, String>>
populatePromoEntryTypes(@ModelAttribute("appInterface")
JspAppInterfaceAdmin appInterface) {
        final Map<String, String> map = new TreeMap<String, Str=

ing>();

        try {
                if (appInterface != null) {
                        Map[] promoEntryTypes ==

appInterface.getUserPromotionTypes();

Ewwwwwwwwwwwwwwwwwwwwwwwwwwwww!

for (int i=0; i<promoEn=

tryTypes.length; i++) {

map.put((=

(Integer) promoEntryTypes[i].get("id")).toString(),

(String) promoEntryTypes[i].get("promotion_name"));

Ewww!

                        } // for
                } // if
        } catch (Exception e) {
                log.error(e.getMessage(), e);

At least you're logging, but you're not recovering. And
'catch(Exception...)' is an antipattern in lower-level code.

        }
        return map.entrySet();
    }

That's some fugly code there, bro.

--
Lew