Sorting an ArrayList of Major.Minor.Incremental Strings

Question

I have an ArrayList of version strings that I would like to sort so that the newest is the first listed.

ArrayList<String> items = new ArrayList<String>();
items.add("4.1.0");
items.add("4.1.1");
items.add("4.1");
items.add("5.1");
items.add("4.0.1");

My Expected Output is:

5.1
4.1.1
4.1.0
4.1
4.0.1

When considering the values as Integers, "4.0.1" is greater than "4.1", which is not true in the case of versions.

I am thinking of using a Comparator Interface for each major, minor and incremental version. Is there an easier way of doing this?

Yes. Since as per maven conventions, minor version takes precedence over incremental version — Upen, Jan 12 '16 at 01:06

score 3 · Accepted Answer · edited May 23 '17 at 12:23

3

Upen, There's a ComparableVersion class from maven for the same.

Also, take a look at this SO conversation

I hope this solves your problem.

edited May 23 '17 at 12:23

Community

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answered Jan 12 '16 at 06:39

Ravindra Mijar

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Works wonders. DefaultArtifactVersion version = new DefaultArtifactVersion("4.1.2");. Thanks much. – Upen Jan 12 '16 at 21:25

score 1 · Answer 2 · answered Jan 12 '16 at 06:53

I faced a similar problem where I had to compare versions of the same library, besides number I had to make sure that the comparison took into account SNAPSHOT vs release point versions. After trying to come up with all the corner cases I decided not to re-invent the wheel and decided to look for a trusted implementation to solve the same problem.

I found the maven ComparableVersion source code and put it in my project since I didn't want to depend in that maven jar in my code.

Hope it helps for you!

Jose Luis

score 0 · Answer 3 · answered Jan 12 '16 at 07:26

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Read some about maven version & Project Dependencies from Maven: The Complete Reference book

http://books.sonatype.com/mvnref-book/reference/pom-relationships-sect-project-dependencies.html

answered Jan 12 '16 at 07:26

amkz

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Sorting an ArrayList of Major.Minor.Incremental Strings

3 Answers3