Can t find Nullable inside javax annotation

Question

I want use  Nullable  annotation to  eliminate NullPointerExceptions  I found some tutorials on the net  I noticed that this annotation comes from the package javax annotation Nullable  but when I import it a compilation error is generated  cannot find symbol

User · Answer

If anyone has this issue when building a Maven project created in IntelliJ IDEA externally, I used the following dependency instead of the answer:

<dependency>
  <groupId>org.jetbrains</groupId>
  <artifactId>annotations</artifactId>
  <version>15.0</version>
</dependency>

Using this will allow the project to build on IntelliJ IDEA and by itself using Maven.

You can find it here.

User · Answer

In case someone has this while trying to compile an Android project  there is an alternative Nullable implementation in android support annotation Nullable  So take care which package you ve referenced in your imports

User · Answer

In the case of Android projects  you can fix this error by changing the project module gradle file  build gradle  as follows   dependencies   implementation  com android support support-annotations 24 2 0      For more informations  please refer here

User · Answer

The artifact has been moved from net sourceforge findbugs to   lt dependency gt       lt groupId gt com google code findbugs lt  groupId gt       lt artifactId gt jsr305 lt  artifactId gt       lt version gt 3 0 0 lt  version gt   lt  dependency gt

User · Answer

JSR-305 is a  quot Java Specification Request quot  to extend the specification   Nullable etc  were part of it  however it appears to be  quot dormant quot   or frozen  ever since  See this SO question   So to use these annotations  you have to add the library yourself  FindBugs was renamed to SpotBugs and is being developed under that name  For maven this is the current annotation-only dependency  other integrations here    lt dependency gt     lt groupId gt com github spotbugs lt  groupId gt     lt artifactId gt spotbugs-annotations lt  artifactId gt     lt version gt 4 2 0 lt  version gt   lt  dependency gt   If you wish to use the full plugin  refer to the documentation of SpotBugs

User · Answer

you can add latest version of this by adding following line inside your gradle build   implementation group   com google code findbugs   name   jsr305   version   3 0 2

User · Answer

I am using Guava which has annotation included     Gradle code    compile  com google guava guava 23 4-jre

User · Answer

You need to include a jar that this class exists in   You can find it here  If using Maven  you can add the following dependency declaration    lt dependency gt     lt groupId gt com google code findbugs lt  groupId gt     lt artifactId gt jsr305 lt  artifactId gt     lt version gt 3 0 2 lt  version gt   lt  dependency gt    and for Gradle   dependencies     testImplementation  com google code findbugs jsr305 3 0 2

User · Answer

If you are using Gradle  you could include the dependency like this   repositories       mavenCentral      dependencies       compile group   com google code findbugs   name   jsr305   version   3 0 0

[java] Can't find @Nullable inside javax.annotation.*

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