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How to enable null annotations on types? [message #1273325]

Wed, 19 March 2014 18:23

Eclipse User

With the release of Eclipse's java 8 support, I understood that null annotations on types were possible, as described here.

I have installed JDK8, and the Java 8 feature patch for Eclipse Kepler.

I was expecting to be able to declare a list that does not allow nulls like this:

List<@NonNull String> nonulls;

However, the compiler tells me that "The annotation @NonNull is disallowed for this location" Sad

My project is configured to use compiler compliance level 1.8, and the org.eclipse.jdt.annotation jar is included in the class path.

What am I missing here?

Regards,
Tom

[Updated on: Thu, 20 March 2014 06:56] by Moderator

Re: How to enable null annotations on types? [message #1273698 is a reply to message #1273325]

Thu, 20 March 2014 07:47

Eclipse User

You need to make sure that your project uses the 2.0 version of JDT
annotation! You have both installed with the feature patch.

Tom

On 19.03.14 15:23, Tom van den Bege wrote:
> With the release of Eclipse's java 8 support, I understood that null
> annotations on types were possible,
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=392099.
>
> I have installed JDK8, and the
> https://wiki.eclipse.org/JDT/Eclipse_Java_8_Support_For_Kepler for
> Eclipse Kepler.
>
> I was expecting to be able to declare a list that does not allow nulls
> like this:
>
>
> List<@NonNull String> nonulls;
>
>
> However, the compiler tells me that "The annotation @Nullable is
> disallowed for this location" :(
>
> My project is configured to use compiler compliance level 1.8, and the
> org.eclipse.jdt.annotation jar is included in the class path.
>
> What am I missing here?
>
> Regards,
> Tom

Re: How to enable null annotations on types? [message #1273782 is a reply to message #1273698]

Thu, 20 March 2014 10:34

Eclipse User

I have added the annotations jar using Quick Fix, which allows you to automatically add the jar to the classpath. Maybe this is not the correct jar? Can you explain where I can find the correct jar?

Thanks a lot,
Tom

Re: How to enable null annotations on types? [message #1273795 is a reply to message #1273782]

Thu, 20 March 2014 10:53

Eclipse User

Should be at the same location but with version number 2.0.0

Tom

On 20.03.14 07:34, Tom van den Berge wrote:
> I have added the annotations jar using Quick Fix, which allows you to
> automatically add the jar to the classpath. Maybe this is not the
> correct jar? Can you explain where I can find the correct jar?
>
>
> Thanks a lot,
> Tom

Re: How to enable null annotations on types? [message #1273950 is a reply to message #1273795]

Thu, 20 March 2014 15:54

Eclipse User

Great, that works!

For anyone having similar problems:

Don't use Quick Fix to add the annotations jar to your build path, but manually copy it from your Eclipse installation. It is located in the 'plugins' directory: org.eclipse.jdt.annotation_2.0.0.v20140317-1808.jar

Thanks,
Tom

Re: How to enable null annotations on types? [message #1273965 is a reply to message #1273950]

Thu, 20 March 2014 16:15

Eclipse User

I guess a bug should be filed against JDT to add the correct annoation
if the project is on Java8 compilance level!

Tom

On 20.03.14 12:54, Tom van den Bege wrote:
> Great, that works!
>
> For anyone having similar problems:
>
> Don't use Quick Fix to add the annotations jar to your build path, but
> manually copy it from your Eclipse installation. It is located in the
> 'plugins' directory: org.eclipse.jdt.annotation_2.0.0.v20140317-1808.jar
>
> Thanks,
> Tom

Re: How to enable null annotations on types? [message #1274067 is a reply to message #1273950]

Thu, 20 March 2014 20:11

Eclipse User

Don't use Quick Fix to add the annotations jar to your build path, but manually copy it from your Eclipse installation. It is located in the 'plugins' directory: org.eclipse.jdt.annotation_2.0.0.v20140317-1808.jar

The quick fix should indeed add the 2.0.0 lib to your project if the project is configured for Java 8.
If that doesn't happen its a bug.

If you have a few more details a bug in bugzilla would be appreciated.

Stephan

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