Naming convention for utility classes in Java

Question

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

Answer 1

I like the convention of just adding "s" to the type name when the type is an interface or a class you don't control. Examples of that in the JDK include Collections and Executors. It's also the convention used in Google Collections.

When you're dealing with a class you have control over, I'd say utility methods belong on the class itself generally.