Naming convention for utility classes in Java

Posted by Zarjay on Stack Overflow See other posts from Stack Overflow or by Zarjay
Published on 2010-04-20T16:10:28Z Indexed on 2010/04/20 16:13 UTC
Read the original article Hit count: 324

Filed under:

java

|

naming-conventions

|

best-practices

When writing utility classes in Java, what are some good guidelines to follow?

Should packges be "util" or "utils"? Is it ClassUtil or ClassUtils? When is a class a "Helper" or a "Utility"? Utility or Utilities? Or do you use a mixture of them?

The standard Java library uses both Utils and Utilities:

javax.swing.Utilities
javax.print.attribute.AttributeSetUtilities
javax.swing.plaf.basic.BasicGraphicsUtils

Apache uses a variety of Util and Utils, although mostly Utils:

org.apache.commons.modeler.util.DomUtil
org.apache.commons.modeler.util.IntrospectionUtils
org.apache.commons.io.FileSystemUtils
org.apache.lucene.wordnet.AnalyzerUtil
org.apache.lucene.util.ArrayUtil
org.apache.lucene.xmlparser.DOMUtils

Spring uses a lot of Helper and Utils classes:

org.springframework.web.util.UrlPathHelper
org.springframework.core.ReflectiveVisitorHelper
org.springframework.core.NestedExceptionUtils
org.springframework.util.NumberUtils

So, how do you name your utility classes?

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about naming-conventions

Entity Framework naming conventions for many-to-many link tables

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, We are designing a SQL Server database with link tables for many-to-many relations. The question is are there any best practices for naming these kinds of tables for use with the entity framework? Let's say there's a table Customer and Address Then there is a link table between them, what… >>> More
Python Naming Conventions for Dictionaries/Maps/Hashes

as seen on Stack Overflow - Search for 'Stack Overflow'
While other questions have tackled the broader category of sequences and modules, I ask this very specific question: "What naming convention do you use for dictionaries and why?" Some naming convention samples I have been considering: # 'value' is the data type stored in the map, while 'key' is… >>> More
Enforce SSIS naming conventions using BI-xPress

as seen on SQL Blog - Search for 'SQL Blog'
A long long long time ago (in 2006 in fact) I published a blog post entitled Suggested Best Practises and naming conventions in which I suggested a bunch of acronyms that folks could use to prefix object names in their SSIS packages, thus allowing easier identification of those objects in log records… >>> More
Product Naming Conventions - Does it make sense

as seen on SQL Blogcasts - Search for 'SQL Blogcasts'
Maybe it’s just me, but with some of the MS Products being released in 2010 with "2010" in their product name, is the naming of the SQL Server product suite being released with product name that doesn’t make sense, our latest SQL Server Release which is now just about to be released is "SQL… >>> More
naming conventions for buttons in user interface

as seen on Stack Overflow - Search for 'Stack Overflow'
User interface for web applications in general contain various buttons for performing CRUD operations. What would be the suggested naming convention for button labels while performing the following actions.. User creation (Add User... or Add User or Add user) Event creation (Add Event... or Add… >>> More