How do I add package level annotations or edit package-info.java?

Question

I'm trying to add package level annotations but I don't have a clue on how to do it. Examples are appreciated.

Answer 1

In eclipse

Since package-info.java isn't a valid identifier for a class it cannot be created as a class in Eclipse.

I found that when you create a new package there is a check box to check if you want a package-info.java.

To create a package-info.java file in an existing package:

1. Right-click on the package where you want a package-info.java.
2. Select New->Package.
3. Check the Create package-info.java check box.
4. Click on Finish.

Answer 2

Summary from the article here

In package-info.java:

@PackageLevelAnnotation package blammy; // package with a package level annotation.   import blammy.annotation.PackageLevelAnnotation; 

In PackageLevelAnnotation.java

package blammy.annotation;  @Retention(RetentionPolicy.CLASS) @Target(ElementType.PACKAGE) public @interface PackageLevelAnnotation {   // stuff as required. } 

Edit: more package level info. Here is a link to the package chapter in the Java Language Spec: packages