File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Java in General and the fly likes Enum Naming Convention Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Java in General
Bookmark "Enum Naming Convention" Watch "Enum Naming Convention" New topic

Enum Naming Convention

hemant Budhewar BamniBk
Ranch Hand

Joined: May 09, 2009
Posts: 33
Hi I have written an enum, FileExtensions which contains some file extensions ,

I have two ways to write this each extension names,

One way just specifying the lower case

enum FileExtensions {
ppt, xls;

in this case I just have to get that enum and which will server my purpose, i.e. appending this enum name to file name.

Another way is as below,

please let me know which is the right,

public enum FileExtensions {
PPT("ppt"), PPTX("pptx"), DOC("doc"), DOCX("docx"), XLS("xls"), XLSX("xlsx"),
OK("ok"), ERR("err"), XMl("xml"), TMP("tmp");

// Extenstion used.
private String extension;

FileExtensions(final String extenstion) {
this.extension = extenstion;

* This is overriden method.
* @see java.lang.Enum#toString().
* @return - String.
public String toString() {
return extension;


Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46397
I agree. Here's the link:
subject: Enum Naming Convention
It's not a secret anymore!