This week's book giveaway is in the Big Data forum.
We're giving away four copies of Elasticsearch in Action and have Radu Gheorghe & Matthew Lee Hinman on-line!
See this thread for details.
The moose likes Beginning Java and the fly likes arranging Strings in alphabetical order Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Elasticsearch in Action this week in the Big Data forum!
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "arranging Strings in alphabetical order" Watch "arranging Strings in alphabetical order" New topic

arranging Strings in alphabetical order

Kevin Tysen
Ranch Hand

Joined: Oct 12, 2005
Posts: 255
I want to arrange some Strings in alphabetical order. Do I have to write a program that looks something like this:

String a;
String b;
if (a.charAt(0) > b.charAt(0)){

// more code here


Well, that is a very rough draft. What I mean is, do I have to write a method that compares all the chars of the Strings to each other, or is there some method in Java.Lang or Java.Util that does that?
Rob Spoor

Joined: Oct 27, 2005
Posts: 19908

String implements the Comparable interface, so you can use that to compare. Alternatively, it also has a compareToIgnoreCase method that allows you to compare regardless of the case:

How To Ask Questions How To Answer Questions
Jim Yingst

Joined: Jan 30, 2000
Posts: 18671
Additionally you can use the sort methods, java.util.Collections.sort() and java.util.Arrays.sort(). These rely on having either a Comparable or a Comparator. String is already a Comparable, but if you want a different sort order you can make a Comparator instead.

"I'm not back." - Bill Harding, Twister
Kevin Tysen
Ranch Hand

Joined: Oct 12, 2005
Posts: 255
Thank you.
I agree. Here's the link:
subject: arranging Strings in alphabetical order