Guava r07，GWT和javax.annotation.Nullable

问题描述

我试图在没有成功的GWT项目中使用Guava（准确地说是一个HashMultimap）。我得到了一个类的堆栈跟踪永无止境的列表：

• com.google.common.collect.ComparisonChain


• com.google.common.collect.ForwardingSortedSetMultimap


• com.google.common.collect.Ordering


• ...
>

每个堆栈跟踪如下：

• line xx：无法解析导入的javax.annotation


• 行xx：可为空的不能解析为类型
  
• 行xx：可为空的不能为解析为类型


• 行xx：可为空的不能解析为类型


• ...

>

查看代码，每个引发错误的文件都包括：

，看着guava-src-r07.jar，每个提到的类都使用@Nullable注解。 / p>

我正在使用JDK6并查看JDK6 javadoc以及...呃，我不能d任何此类注释。我可以让这些库使用GWT项目和JDK6吗？

- 你在那里使用什么版本的Java？

解决方案

嗡嗡声...我想这是你要找的jsr305 。看看

这里一定比较好：
其中I请参阅@Nullable注释

I'm trying to use Guava in a GWT project without success (a HashMultimap, to be precise). I get a never-ending list of stacktraces for classes:

• com.google.common.collect.ComparisonChain
• com.google.common.collect.ForwardingSortedSetMultimap
• com.google.common.collect.Ordering
• ...

Each stack trace is along the lines of:

• line xx: the import javax.annotation cannot be resolved
• line xx: Nullable cannot be resolved to a type
• line xx: Nullable cannot be resolved to a type
• line xx: Nullable cannot be resolved to a type
• ...

Looking at the code, each file that throws an error includes:

and, looking at the guava-src-r07.jar, each mentioned classes uses a @Nullable annotation.

I'm using JDK6 and looking at the JDK6 javadoc and...well, I can't find any such annotation. Can I get these libraries to work with a GWT project and JDK6?

P.S. - What version of Java are you using over there?

解决方案

Hum... I think it's the jsr305 you're looking for. Take a look at

http://www.findjar.com/jar/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar.html

It must be better here: http://code.google.com/p/guava-libraries/source/browse/#svn/trunk/libwhere I see the @Nullable annotation

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