Develop Reference

Adding Stanford CoreNLP 3.9.2 as Dependency via Maven

I'm trying to add Stanford CoreNLP 3.9.2 as dependency to my Eclipse/Maven project:
<dependency>
<groupId>edu.stanford.nlp</groupId>
<artifactId>stanford-corenlp</artifactId>
<version>3.9.2</version>
</dependency>
Next to my POM.xml file I see a little red x icon. When I open POM.xml there is no additional information regarding the error.
When I click on Java -> Properties -> Java Build Path -> Maven Dependencies I see that the Jars that were expected to be added to Maven via this dependency are missing. This is odd because I regularly add dependencies this way without any error.
Apparently, something is preventing Maven from downloading the dependencies. What could it be?
Update:
I changed POM file to version 3.5.2 (instead of 3.9.2) and now all errors are gone.
If anyone can explain WHY this solved my problem (and how to make things work with version 3.9.2) I will accept it as the answer.
Update:
When I go to my Maven repository I see that most of the required Jars have been downloaded by Maven. For example, Maven repository will contain the folders: \\maven\.m2\repository\edu\stanford\nlp\stanford-corenlp\3.9.2 However the folder will not contain the Jar: stanford-corenlp-3.9.2 - but it will contain every other Jar such as stanford-corenlp-3.9.2-models and stanford-corenlp-3.9.2-sources etc.
This makes the whole situation even more confusing. If Maven is downloading the Jars why is it skipping just one Jar? I looked in several other folders (dependencies of corenlp) and I see similar phenomenon - it's always the main Jar of that folder that is missing.
What's worse, when I download and add the missing Jars manually to Maven folder, the (missing) text next to Jar goes away but there's still a little red x icon next to POM file. I have no idea what is going on.
Any insights?
Thanks!

I have no idea why this fixed the problem but in my POM file I had an entry:
<dependency>
<groupId>org.eclipse.platform</groupId>
<artifactId>org.eclipse.debug.core</artifactId>
<version>3.13.0</version>
</dependency>
I update this dependency to:
<dependency>
<groupId>org.eclipse.platform</groupId>
<artifactId>org.eclipse.debug.core</artifactId>
<version>3.14.0</version>
</dependency>
Now all errors have disappeared.

NoClassDefFoundError on Maven dependency present locally

I am new to Maven Project. I am making changes to one of the open source maven project. I am facing a problem in adding a library to the project. So far i have done this :-
I added a library named jni4net.j-0.8.8.0.jar to the resources folder of the project.
I right clicked the jar(in Intellij) and clicked 'Add as library'.
Then in the pom.xml i added:-
<dependency>
<groupId>jar.0.8.8.0.jni4net</groupId>
<artifactId>jar.0.8.8.0.jni4net</artifactId>
<version>0.8.8.0</version>
<scope>system</scope>
<systemPath>${basedir}/src/main/resources/jni4net.j-
0.8.8.0.jar</systemPath>
</dependency>
But when i build this project(build is successful, test cases are running) and use this it throws following error:-
java.lang.NoClassDefFoundError: net/sf/jni4net/Bridge
Please help me resolve it. I am new to maven and pom. I have looked at various answers, but not getting it right.
PS - I named groupId and artifactID as just reverse of jar file

This is not the right way to add that dependency.
All you need is:
<dependency>
<groupId>net.sf.jni4net</groupId>
<artifactId>jni4net.j</artifactId>
<version>0.8.8.0</version>
</dependency>
The dependency will be retrieved from Maven Central when you build.
Using <systemPath>...</systemPath> is highly discouraged as it usually ties your project to a local environment.

Since jni4net.j dependency is available in maven central, You don't have to download and put the dependency manually. Maven will download and store the dependency locally in `'.m2' folder. Just add dependency as bellow.
<dependency>
<groupId>net.sf.jni4net</groupId>
<artifactId>jni4net.j</artifactId>
<version>0.8.8.0</version>
</dependency>

Include a library while programming & compiling, but exclude from build, in NetBeans Maven-based project

In NetBeans 8, in a Maven-based project, how does one use a jar while programming but omit from build?
I need to access some specific classes in a specific JDBC driver in my Vaadin web app. But in web apps, we normally do not bundle JDBC drivers within our build (the .war file). Instead, the JDBC drivers belong in a folder controlled by the Servlet container (the runtime environment).
So, I need the JDBC driver (a jar file) to be on the classpath while I am editing my code and compiling. But that jar file must be omitted from the build.
exclusions Tag
I tried adding the exclusions and exclusion tags to my dependency element. But this did not work – The postgresql-9.4-1201.jdbc41.jar appeared in WEB-INF/lib folder.
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1201-jdbc41</version>
<exclusions>
<exclusion>
<groupId>org.postgresql</groupId> Exclude from build
<artifactId>postgresql</artifactId>
</exclusion>
</exclusions>
</dependency>
New Profile?
This Answer by ZNK - M on the Question, Setting custom runtime classpath for a maven project in netbeans, may be what I need.
But creating a new project profile seems like overkill what seems like small little task to me. And, I always want to exclude this jar from my build output, not just when testing or in other limited scenarios.
You should add a new profile run-with-netbeans in your pom that declares the additional dependencies (use the provided scope to not include them in the release).
Then you'll have to add the new profile to your IDE to run the pom with the -P run-with-netbeans option in the command line.
But I am familiar only with the basics of editing a POM file. If that approach is the way to go, it would be helpful if someone could expand on the details and steps needed.

<scope>provided</scope>
Use <scope> tag in POM file, with a value of provided.
Excerpt from the Dependency Scope section of the page, Introduction to the Dependency Mechanism :
compileThis is the default scope, used if none is specified. Compile dependencies are available in all classpaths of a project. Furthermore, those dependencies are propagated to dependent projects.
providedThis is much like compile, but indicates you expect the JDK or a container to provide the dependency at runtime. For example, when building a web application for the Java Enterprise Edition, you would set the dependency on the Servlet API and related Java EE APIs to scope provided because the web container provides those classes. This scope is only available on the compilation and test classpath, and is not transitive.
runtime[…]
test[…]
system[…]
import[…]
Like this:
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1201-jdbc41</version>
<scope>provided</scope>
</dependency>

Use the provided scope instead of the default compile scope for this dependency. That's exactly what it's for.
<dependency>
<scope>provided</scope>
<groupId>...</groupId>
<artifactId>...</artifactId>
<version>...</version>
</dependency>

Eclipse-Maven Complex Project Dependency (ApacheJena)

I'm fairly new to the Eclipse and Maven2 worlds. I'm struggling to comprehend how to add a Maven project dependency on Apache Jena in a simple way. Specifically, I'd like to add a dependency such as
<dependency>
<groupId>org.apache.jena</groupId>
<artifactId>jena</artifactId>
<version>${jena.version}</version>
</dependency>
And this would automatically pull in the modules(eg. jena-arq, jena-core, etc). However, adding this dependency results in a Missing artifact org.apache.jena:jena:jar:2.11.1 error. If I add <type>pom</type> to the dependency the error is gone but I do not get the jars in my project.
In any event, as I understand it, POM is more suited to project <--modules dependencies and what I'm really looking for is project --> lib archive dependencies.
How do I establish such a relationship? I considered simply replicating the dependency for each module in Jena since it's using a property anyway. However, it is possible, and Jena is a prime example, that not all modules in a project share the same version. For example jena-core is on 2.11.1 where jena-tdb is on 1.0.1 however jena-2.11.1 encompasses jena-tdb.
Thanks

See http://jena.apache.org/download/maven.html for details.
In brief:
<dependency>
<groupId>org.apache.jena</groupId>
<artifactId>apache-jena-libs</artifactId>
<type>pom</type>
<version>2.11.1</version> <!-- Set version -->
</dependency>
Note that it is type pom.

there is not a easy way do this.
you must define every dependency jar with special version.

Maven swizzle dependency doesn't work

I try to compile this pom file but it doesn't download
import org.codehaus.swizzle.confluence.*;
dependency. I get pom file from maven's site. Search Maven Swizzle

That's the POM of the swizzle-confluence library, i.e. the POM file that the library's project uses for its own build.
Instead, you need to add the dependency declaration for this library to your project's POM. In Maven Central search, this is available on the left-hand-side of the version information page, under Dependency Information.
So, open up the page for swizzle-conflunce:1.6.2, and you can see that this is:
<dependency>
<groupId>org.codehaus.swizzle</groupId>
<artifactId>swizzle-confluence</artifactId>
<version>1.6.2</version>
</dependency>
Also, to help yourself in the future, consider reading about the POM and how dependencies work.