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Why do I get a module missing error for a dependency that I added in maven , and i need to resolve it?

Error:(10, 18) java: package com.google.gson is not visible
(package com.google.gson is declared in module gson, but module AnimalShelter fails to read it)
I'm getting this error after adding the gson dependency to my maven, I'm completely lost as to how to fix it, I've googled around and it was suggested I put a required in my module-info.java. Did that, it fixes the IDE error but then when I try to run
java.lang.module.FindException: Module gson not found, required by AnimalShelter
I'm honestly not up to speed with how modules work at all so I might be overlooking somthing easy, but isn't it supposed to work after adding the dependency in my maven pom.xml? The pom.xml snippet is shown below
pom.xml: (imported)
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupId</groupId>
<artifactId>AnimalShelterYori</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.1.1</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/../mods</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.22.0</version>
</plugin>
</plugins>
</build>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.openjfx/javafx-controls -->
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>11.0.2</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.openjfx/javafx-fxml -->
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>11.0.2</version>
</dependency>
<!-- ... -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.4.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.4.0</version>
<scope>test</scope>
</dependency>
<!-- ... -->
</dependencies>
</project>

You could try below options:
The scope of Gson dependency is provided so make sure at runtime this will be provided by any container
Update the maven project and do clean install
Try using latest version of Gson
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
<scope>provided</scope>
</dependency>

Using Maven's provided scope implies the dependency does not need to be packaged with your application (i.e. you're deploying to an app server like Tomcat that will provide the dependency). Try removing the scope all together or change to the default of compile.

Java Maven dependency inheritance

I created maven artifact, that have dependencyies on gson and ok3http.
The pom.file
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<name>test</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.7</version>
</dependency>
</dependencies>
<build>
<finalName>testConnect</finalName>
<plugins>
<!-- download source code in Eclipse-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
</configuration>
</plugin>
<!-- Set a compiler level -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<!-- Copy project dependency -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.5.1</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<!-- exclude junit, we need runtime dependency only -->
<includeScope>runtime</includeScope>
<outputDirectory>${project.build.directory}/dependency-jars/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Now I send it to local repository (later will send to Maven central) and I want people to be able to use my artifact in their pom files like:
<dependency>
<groupId>com.test</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
</dependency>
It builds ok, but when I try to use it, it throws error that it can not found gson and ok3http.
If I add also:
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.7</version>
</dependency>
It started to work. Is it possible that people can add dependency to my artifact only and other dependencies will add automatically or something like this?? Thanks!
Although will be very thankful if you give me the right documentations how to send my code to maven repo.

Encoding in Maven Tests not working properly

I am currently trying to write a test that is run via Maven that specifically addresses strings containing UTF-8 characters. If I run said test in IntelliJ everything is fine and the results are as expected. If i run the test using mvn test, then (only) the test that is testing UTF-8 characters is failing.
This is my test:
#Test
public void testWithUTF8() throws InvalidKeyException, NoSuchAlgorithmException {
String signature = NFLAuth.sign("Contains UTF-8: äüöööÕßÍÑð");
Assert.assertEquals("Signature=BSY4prbinpAgzJLv6ffGm+XJb1NTIbGY6gTj8RA3lsA=", signature);
}
First of all, yes, I read the question about encoding in Maven and I did everything. Theres the property, its added to the compiler plugin, I have even set JAVA_TOOL_OPTIONS with file.encoding but still no luck. I also dont know what encoding it is using, if I try windows-1252 in IntelliJ the test also fails, but the signature is not the same as maven gets.
Here is the POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>***</groupId>
<artifactId>***</artifactId>
<version>1.0</version>
<name>***</name>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.10</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>com.apigee.edge.4g</groupId>
<artifactId>expressions</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>com.apigee.edge.4g</groupId>
<artifactId>message-flow</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>com.apigee.edge.4g</groupId>
<artifactId>kernel</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/kernel-api-1.0.0.jar</systemPath>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.10.19</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.2</version>
</dependency>
</dependencies>
</project>

The maven surefire plugin also needs to read the files as UTF-8 otherwise it wont do it :). I had tried something like this before but with the wrong Element in <configuration/>...
Proper configuration:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<argLine>-Dfile.encoding=UTF-8</argLine>
</configuration>
</plugin>

Set (Windows) environment variable JAVA_TOOL_OPTIONS to -Dfile.encoding=UTF8
The other answer (set encoding to Surefire config) did not solve my issue.
After setting JAVA_TOOL_OPTIONS, no surefire configuration is needed.

I had to only set two Windows environment variables:
JAVA_TOOL_OPTIONS to -Dfile.encoding=UTF8 (thanks to #joro)
MAVEN_OPTS to -Dfile.encoding=UTF8

Running groovy tests with Maven

I have a folder structure as below
ProjectName
- src
- test
- groovy
- java
When I run command mvn clean install . It only runs Java Unit tests(Located under *src\test\java* directory) while Groovy tests cases are not invoked. It seems Groovy is not finding Groovy tests anymore.
Please help me in enabling groovy tests cases Execution with the help of Maven ?
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ApacheActiveMQSpike</groupId>
<artifactId>ApacheActiveMQSpike</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>ApacheActiveMQSpike</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-all</artifactId>
<version>5.8.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>1.6-beta-2</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

You will need to use gmaven plugin to trigger groovy tests
<plugin>
<groupId>org.codehaus.groovy.maven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.0-rc-3</version>
<extensions>true</extensions>
<executions>
<execution>
<goals>
<goal>testCompile</goal>
</goals>
<configuration>
<sources>
<fileset>
<directory>${pom.basedir}/src/test/java</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</fileset>
</sources>
</configuration>
</execution>
</executions>
</plugin>
Nice article about running Groovy tests in Maven.
The structure should be
<project>
...
<build>
<plugins>
<plugin>
....
</plugin>
</plugins>
</build>
...
</project>

Package missing on maven build

I'm trying to run a JUnit test in Travis CI using Maven, but every attempt makes me face the same error:
[ERROR] \luiz.kill\Workspace\hawickjames\src\main\java\com\lzkill\main\CountElementaryCircuitsFromRFC.java:[3,24] error: package org.jgrapht.graph does not exist
I also see this when I use m2e to fire Maven, the dependencies don't even show up Eclipse as if the download was not processed.
It really looks like a javac problem. How can I make the download succeed and the compiler find the right jars?
Here's my pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lzkill</groupId>
<artifactId>myArtifact</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>...</name>
<description>...</description>
<url>...</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.jgrapht</groupId>
<artifactId>jgrapht</artifactId>
<version>0.9.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12</version>
<configuration>
<testFailureIgnore>false</testFailureIgnore>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.9.1</version>
<configuration>
<show>protected</show>
<windowtitle>...</windowtitle>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

You did not specify any dependencies only which version to use if you declare a dependency.
Remove the the dependencyManagement tags and you are set.
DependencyManagement helps you resolve version conflicts and is a good idea in a parent pom of multiple related projects. But it does not declare a dependency.