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How to resolve a Maven dependency of type pom?

I am trying to import a library in Maven which is Kotlin Multiplatform.
This is it's Github repo (does not actually matter much of course)
Point is, it says it can be imported in with this dependency for Gradle:
dependencies {
implementation("com.github.ajalt.colormath:colormath:2.0.0")
}
Obviously, just converting it to Maven does not work:
<dependencies>
...
<dependency>
<groupId>com.github.ajalt.colormath</groupId>
<artifactId>colormath</artifactId>
<version>2.0.0</version>
<type>jar</type>
</dependency>
</dependencies>
So I added it's pom to the project as this answer explains it:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.github.ajalt.colormath</groupId>
<artifactId>colormath</artifactId>
<version>2.0.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
This dependency is resolved (it can be only resolved as pom type. Then I add it as dependency:
<dependencies>
...
<dependency>
<groupId>com.github.ajalt.colormath</groupId>
<artifactId>colormath</artifactId>
<version>2.0.0</version>
<type>jar</type>
</dependency>
</dependencies>
It still cannot find it.
I also added the repo1, because I did not see where Maven was looking for this artifact:
<repositories>
<repository>
<id>central</id>
<name>Central Repository</name>
<url>https://repo1.maven.org/maven2</url>
</repository>
</repositories>
But still no success. I don't understand why it's not working.
The code can be found in the repo1, but Maven does not resolve it.
This must be a very simple thing I am not understanding here, please help.

The link to the Maven Central from GitHub points to a bare POM artifact, without any dependencies and/or attached JARs.
It looks like Kotlin MP uploads JVM-specific artifacts with a different artifactId - colormath-jvm in this case. Please check corresponding directory in the Maven Central.
I suggest using following dependency declaration in the POM:
<groupId>com.github.ajalt.colormath</groupId>
<artifactId>colormath-jvm</artifactId>
<version>2.0.0</version>

Confluent jar not recognized by Eclipse

I have the below dependency configuration in my pom.xml. I am able to download both the JARs, but Eclipse is not recognizing kafka-json-schema-serializer. I have tried to clean, delete, re-import, and update the project, but to no avail.
How can I solve this problem?
pom.xml configuration:
<dependency>
<groupId>io.confluent</groupId>
<artifactId>kafka-json-serializer</artifactId>
<version>6.0.0</version>
</dependency>
<dependency>
<groupId>io.confluent</groupId>
<artifactId>kafka-json-schema-serializer</artifactId>
<version>6.0.0</version>
</dependency>
I am also receiving the following error when running mvn install:
[WARNING] The POM for
io.confluent:kafka-schema-registry-client:jar:6.0.0 is invalid,
transitive dependencies (if any) will not be available, enable debug
logging for more details

You need to add the confluent repository under repositories section in your pom.xml in order to allow maven recognize the confluent dependencies. Here is the snippet:
<repositories>
<repository>
<id>confluent</id>
<url>https://packages.confluent.io/maven/</url>
</repository>
</repositories>

Unable to add IBM db2jcc4 jar file through Maven

I am trying to access DB2 tables in a java project. I am able to access the tables when I manually added the jar files - db2jcc4.jar and db2jcc_license_cisuz.jar. No issues in accessing the tables.
But when I try to add these jar files through Maven, they won't add to the project.
<dependency>
<groupId>com.ibm.db2</groupId>
<artifactId>db2jcc4</artifactId>
<version>9.7.0.4</version>
</dependency>
Error Message - Missing artifact id.
Also, the latest db2jcc4.jar files (Version 11.1) are not present in Maven repository. Is there any other place I can access it from?

You have to download the right driver from IBM.
http://www-01.ibm.com/support/docview.wss?uid=swg21363866
Then install it to your local maven repository
http://maven.apache.org/plugins/maven-install-plugin/install-file-mojo.html

As written in maven central repository the artifact is in another repo.
Add it to your pom and it will work.
<repositories>
<repository>
<id>Alfresco</id>
<name>Alfresco</name>
<url>https://artifacts.alfresco.com/nexus/content/repositories/public/</url>
</repository>
</repositories>

Assuming that , using share drive is the option to go.
<dependency>
<groupId>com.ibm.db2.jcc</groupId>
<artifactId>licences</artifactId>
<version>0.7</version> <!-- Adjust this properly -->
<scope>system</scope>
<systemPath>R:\JDBC drivers\IBM DB2_db2_2.2.0.v20130525_0720\db2jcc_license_cisuz.jar</systemPath>
</dependency>

According to maven central repository the artifact is in another repository. Include these two in your pom.xml and it should work:
<dependency>
<groupId>com.ibm.db2.jcc</groupId>
<artifactId>db2jcc4</artifactId>
<version>10.1</version>
</dependency>
<repositories>
<repository>
<id>com.ibm.db2.jcc</id>
<url>https://artifacts.alfresco.com/nexus/content/repositories/public/</url>
</repository>
</repositories>

Maven: NoClassDefFoundError of system scoped dependency

I am developing an Android project with Maven. I have a third-party jar file that I have included in a lib folder on my project root directory:
<dependency>
<groupId>com.parse</groupId>
<artifactId>parse</artifactId>
<version>1.9.2</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\Parse-1.9.2.jar</systemPath>
</dependency>
But when I install the apk in my phone, I get NoClassDefFoundError. Obviously, that class exists inside the jar.
How can I do?
Thanks.

I would suggest using one of your directories as a repository, add your jar in it, and load it the proper Maven way.
You can do this adding this to your pom.xml and putting your jar in /lib:
<repositories>
<repository>
<id>mylibid</id>
<url>file://${project.basedir}/lib</url>
</repository>
</repositories>
...
<dependencies>
...
<dependency>
<groupId>com.parse</groupId>
<artifactId>parse</artifactId>
<version>1.9.2</version>
</dependency>
...
</dependencies>

Add my two cents here, you can install the third-party into your local repository firstly and try add dependency directly.
Take your scenario as an example. Change to the folder where contains the third jar and type:
mvn install:install-file -DgroupId=com.parse -DartifactId=parse -Dversion=1.9.2 -Dpackaging=jar -Dfile=Parse-1.9.2.jar
Modify your pom.xml to add the dependency.
<dependencies>
...
<dependency>
<groupId>com.parse</groupId>
<artifactId>parse</artifactId>
<version>1.9.2</version>
</dependency>
...
</dependencies>

How to get sources in my project

I'm trying to get sources added to my project. I manually added the below repo and included an atmosphere snapshot.
<repositories>
<!-- Added to get the Atmosphere 1.1.0-SNAPSHOT, can be removed when 1.1.0 is released -->
<repository>
<id>oss.sonatype.org-snapshot</id>
<url>http://oss.sonatype.org/content/repositories/snapshots</url>
<releases><enabled>false</enabled></releases>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.atmosphere</groupId>
<artifactId>atmosphere-runtime</artifactId>
<version>1.1.0-SNAPSHOT</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
I went and downloaded the .jar from here but when I add it to the "libraries" section in my Project Structure it doesn't add it as a source, but adds it under Classes.
In debugging when viewing the interface of a class, I've used the quick "Attach sources..." option at the top of the editor and navigated to the .jar with no avail.

Maven doesn't find the sources, because there are no sources of that library in that Maven repository (which i think is quite common for snapshots of a library). I downloaded one of the jars, and they contain only class files, so i'm wondering, how you can see the sources even if you attach the jar manually.