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
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:
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>jsr305</artifactId>
<version>3.0.2</version>
</dependency>
and for Gradle:
dependencies {
testImplementation 'com.google.code.findbugs:jsr305:3.0.2'
}