@Nullable / @Null / @NotNull / @Notnull / @Nonnull / @CheckForNull annotations | just some Java guy



@Nullable / @Null / @NotNull / @Notnull / @Nonnull / @CheckForNull annotations | just some Java guy

Here is a quick summary of the differences:

JSR-303

  • Used for runtime bean validation, NOT static code analysis
  • javax.validation.constraints.NotNull
  • javax.validation.constraints.Null


JSR-305

  • Used for Static code analysis - seems to be all but dead
  • javax.annotation.Nonnull
  • javax.annotation.Nullable


Findbugs

  • Used by the Findbugs static code analysis tool
  • edu.umd.cs.findbugs.annotations.NonNull
  • edu.umd.cs.findbugs.annotations.Nullable (Probably not what you want)
  • edu.umd.cs.findbugs.annotations.CheckForNull

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