Re: How to sort these Strings?

From:
RedGrittyBrick <RedGrittyBrick@SpamWeary.foo>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 07 Aug 2008 14:41:31 +0100
Message-ID:
<489afb8c$0$2520$da0feed9@news.zen.co.uk>
www wrote:

Hi,

I have a TreeMap:

        final TreeMap<String, String> treeMap = new TreeMap<String,
String>(getMap());
        final Set<Map.Entry<String, String>> mySet = treeMap.entrySet();

        for (final Map.Entry<String, String> curEntry : mySet)
        {
            resultStr.append(curEntry.getKey() + "=" +
curEntry.getValue() + LINE_END);
        }

It prints out in an order based on the key(String) alphabetic order,
which is what I want. The only problem is that sometimes, the keys are:

STATE_0, STATE_1, .. , STATE_10, ..., STATE_20

Now, they are not printed out the order I want. How can I make it print
out the order:

STATE_0
STATE_1
...
STATE_10
..

Thank you very much.


Create a suitable comparator (e.g. using String#split) and pass it to
the TreeSet constructor.

<http://java.sun.com/j2se/1.5.0/docs/api/java/util/TreeMap.html#TreeMap(java.util.Comparator)>
(or http://preview.tinyurl.com/3xtsqc or http://tinyurl.com/3xtsqc)

I recall a similar question recently. If you use Google to search
Groups for TreeMap, in the last month in comp.lang.java.programmer
you'll find discussion and examples of this.

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