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Could not resolve dependencies for my Maven project

I am trying to create a program that will use the sikulix libraries. So I copy pasted the dependencies from https://mvnrepository.com/artifact/com.sikulix/sikulixapi/1.1.2. Then I ran mvn install to install the libraries and I got this error
[ERROR] Failed to execute goal on project auto-fish: Could not resolve dependencies for project com.bine:auto-fish:jar:1.0: Could not find artifact com.github.vidstige:jadb:jar:-v1.0-g94ebf38-23 in central (https://repo.maven.apache.org/maven2)
After doing some research I realized I may need to add a repositories tag with the sikulixapi repo. That gave me this error.
[ERROR] Failed to execute goal on project auto-fish: Could not resolve dependencies for project com.bine:auto-fish:jar:1.0: Could not find artifact com.github.vidstige:jadb:jar:-v1.0-g94ebf38-23 in Sikulix Repo (https://mvnrepository.com/artifact/com.sikulix/sikulixapi)
At this point I am unsure as to what I should do. This is my first every Maven project.
`
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.bine</groupId>
<artifactId>auto-fish</artifactId>
<version>1.0</version>
<name>auto-fish</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<repositories>
<repository>
<id>Sikulix Repo</id>
<url>https://mvnrepository.com/artifact/com.sikulix/sikulixapi</url>
</repository>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sikulix/sikulixapi -->
<dependency>
<groupId>com.sikulix</groupId>
<artifactId>sikulixapi</artifactId>
<version>1.1.2</version>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
`
The code is split up but note that they are all in the pom file for my maven project. Also the first 5 lines aren't not showing up for some reason but I feel like they are not important. And i'm using Vs code for all this.
And if you're wondering the goal of this is to create something that will play some dumb fishing game for me, but this is more of a test to see if I can pull it off rather than something I actually need lol.

If you look at your vidstige artifact in mvnrepository.com, you'll see it lists "Mulesoft" as the only repo that contains it. Following that link shows https://repository.mulesoft.org/nexus/content/repositories/public/ as the optional repository URL you should be adding, not the mvnrepository URL you added which was just a link to the mvnrepository search engine results.
So in short, this should hopefully work:
<repository>
<id>Mulesoft Repo</id>
<url>https://repository.mulesoft.org/nexus/content/repositories/public/</url>
</repository>
Note I'm unfamiliar with this repository, so if it requires any kind of authentication or licensing you would want to follow up with instructions from that repo owner.

Alternatively you can skip the dependency download using exclusion.
Since i am not aware of your source code. I am just suggesting this solution
<dependency>
<exclusions>
<exclusion>
<groupId>com.github.vidstige</groupId>
<artifactId>jadb</artifactId>
</exclusion>
</exclusions>
</dependency>
Solution found from LaunchPad

How do I include tools.jar in my dependencies?

This reference explained how to include tools.jar in the dependencies.
But I don't know where should I insert that code to?
Should I insert it to the setting.xml of Maven or the pom.xml of my Java project?
I used the default maven in Eclipse 4.5.2(Mars.2 Release in Win7).
I want to include tools.jar in my project.
I could use the following code to include it in the pom.xml.
<dependency>
<groupId>jdk.tools</groupId>
<artifactId>jdk.tools</artifactId>
<scope>system</scope>
<version>1.4.2</version>
<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
</dependency>
I also want to try to use java.home, not JAVA_HOME.
I only know that they are different, but I don't exactly know the differences between them.
After reading that reference, I want to try it out. But I failed.
So how should I use java.home to configure the pom.xml file to include tools.jar?
UPDATE:
I could reference java.home like this:
<project ...>
...
<properties>
<java.home>D:\Program Files\Java\jdk1.6.0_45</java.home>
</properties>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.4.2</version>
<scope>system</scope>
<systemPath>${java.home}/lib/tools.jar</systemPath>
</dependency>
</dependencies>
</project>

You can define a similar profile in your pom.xml as -
<!--This can help you use a custom java home path-->
<properties>
<java.home>/your/path/to/java</java.home>
</properties>
...
<profiles>
<profile>
<id>default-tools.jar</id>
<activation>
<property>
<name>java.vendor</name>
<value>Sun Microsystems Inc.</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.4.2</version>
<scope>system</scope>
<systemPath>${java.home}/relative/path/to/lib/tools.jar</systemPath>
</dependency>
</dependencies>
</profile>
Using the reference mentioned to form the profile above.
You need to specify the path to your custom Java home under the properties which can further replace it in the systemPath under the dependency where you specify further the relative path to the tools.jar.

#nullpointer is correct, just to add on the maven properties regarding your java home, you can see the output of the Maven java.home property as compared to your JAVA_HOME environment variable with running mvn validate and adding to your pom the code snippet below:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.1</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<echo>Displaying value of java home property: ${java.home}</echo>
<echo>Displaying value of JAVA_HOME variable: ${env.JAVA_HOME}</echo>
</tasks>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
For example, on my system it outputs (among other things):
[echo] Displaying value of java home property: /usr/lib/jvm/java-8-openjdk-amd64/jre
[echo] Displaying value of JAVA_HOME variable: /usr/lib/jvm/java-8-openjdk-amd64

Jsoup NoClassDefFoundError

I get NoClassDefFoundError at jsoup library trying to run my project jar on other computer.
I added jsoup as maven dependency, added in project settings-modules-dependencies, though I get same Exc.
I run project via:
java -classpath lostfilm-1.0.jar project.start.Entrance
Please tell me where am I wrong.
4.0.0
<groupId>lostfilm</groupId>
<artifactId>lostfilm</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<modules>
</modules>
<dependencies>
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.7.3</version>
</dependency>
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>

Add the JSoup jar file to your classpath
java -classpath lostfilm-1.0.jar;jsoup.jar project.start.Entrance

Add this to your POM:
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.1</version>
<configuration>
<mainClass>project.start.Entrance</mainClass>
</configuration>
</plugin>
</plugins>
</build>
and then run
mvn exec:java
from the root directory of your project. Running your code this way will pull in all your maven dependencies without adding them to command line.

Maven compilation error for android Project "error: package R does not exist "

I am trying to set up a MAVEN project with Android application.
I have this 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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myproject</groupId>
<artifactId>userprofile</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>userprofile</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>4.1.1.4</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
and during MAVEN compile I get this error (about 100 times, ie as many times as it is used in my methods)
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
src\main\java\com\myproject\userprofile\BaseActivity.java:[52,43] error: package R does not exist
Process finished with exit code 1
Any idea about this error? On the web I either find unanswered questions about similar error output. I have no experience on MAVEN, so I believe I am missing something here.

R class is build by your IDE during compilation. MAVEN cannot find the R class because by default the class can be found under build folder. You need to add something like this
<sourceDirectory>build</sourceDirectory>
<outputDirectory>target</outputDirectory>
telling MAVEN that you have some resource files under build folder and you want to make them available to compile so add them under the target folder which will be under your project.
so now I have
build
|----res
|----src
src
|----main
|----java
|----res
target

After a quick look, I believe you're missing the build element. Maven is building the project with current sources, R and other gen classes have not been generated yet. At least you need something like (after dependencies tag):
<build>
<finalName>${project.artifactId}</finalName>
<sourceDirectory>src</sourceDirectory>
<pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.7.0</version>
<extensions>true</extensions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<configuration>
<sdk>
<!-- platform or api level (api level 16 = platform 4.1)-->
<platform>16</platform>
</sdk>
</configuration>
</plugin>
</plugins>
</build>
Also the packaging must be apk:
<packaging>apk</packaging>
I would strongly recommend to start reading the Android Maven documentation along with samples.

This error might happen if you had modify the package name that generate by archetype:generate, for me, I use android-quickstart to generate the module structure :
mvn archetype:generate \
-DarchetypeArtifactId=android-quickstart \
-DarchetypeGroupId=de.akquinet.android.archetypes \
-DarchetypeVersion=1.0.11 \
-DgroupId=com.yy.android.gameLibs \
-DartifactId=sample
akquient recommend me to use "com.yy.android.gameLibs" as package name and I accepted, I compile this module successful and worked. After that, I change the package name as "com.yy.android.sample" also change the Androidmenifest.xml package attribute, therefore the module report that error, I follow back the generate command and choice package name myself to solve this.

Modify packaging to apklib, like this:
<packaging>apklib</packaging>
And add build goal at end of pom.xml like this:
<dependencies>
<!--Android deps -->
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>4.0.1.2</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<sdk>
<platform>17</platform>
</sdk>
</configuration>
<extensions>true</extensions>
</plugin>
</plugins>
</build>

Maven: javax.servlet specification deployed

I've a web application configured with Maven which uses a library, also configured with Maven and when I package geronimo-servlet_3.0_spec-1.0.jar is included in WEB-INF/lib and I don't understand why.
I check the library with mvn dependency:tree
$ mvn dependency:tree | grep geronimo
[INFO] +- org.apache.geronimo.specs:geronimo-servlet_3.0_spec:jar:1.0:provided
I check my web app:
$ mvn dependency:tree | grep geronimo
$
However when I run mvn:package the file gets included in WEB-INF/lib.
When I run mvn tomcat:run I can see:
INFO: validateJarFile(/home/stivlo/workspace/private/src/main/webapp/WEB-INF/lib/geronimo-servlet_3.0_spec-1.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Why and how to avoid? Thank you.
UPDATE 1: as requested I add the 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>org.obliquid</groupId>
<artifactId>test-webapp</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>private webapp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
<!-- For Jakarta ORO -->
<repository>
<id>mvnsearch</id>
<name>Maven Search</name>
<url>http://www.mvnsearch.org/maven2/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
<version>0.9-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>private</finalName>
</build>
</project>
UPDATE 2: I followed the advice of Stephen C and modified the build section as follows:
<build>
<finalName>private</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war</artifactId>
<version>2.1</version>
<configuration>
<overlays>
<overlay>
<groupId>org.obliquid</groupId>
<artifactId>test-webapp</artifactId>
<excludes>
<exclude>WEB-INF/lib/geronimo-servlet_3.0_spec-1.0.jar</exclude>
</excludes>
</overlay>
</overlays>
</configuration>
</plugin>
</plugins>
</build>
However geronimo*.jar still gets included. I guess I've made a mistake in this configuration.
UPDATE 3: Stephen C. says that I should use
the groupId the artifactId of the WAR
file that contains the JAR file(s)
that you are trying to exclude.
I didn't know that WAR files could have a groupId and artifactId, in fact in my pom.xml I don't see any. My project builds a WAR file and has a groupId and an artifactId and those were the ones I tested above without success.
The dependency causing the problem is the following (is a JAR, not a WAR):
<dependency>
<groupId>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
<version>0.9-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
If I try to use the groupId and artifactId listed in this dependency I've the following error:
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-war-plugin:2.1.1:war
(default-war) on project test-webapp:
overlay [ id
org.obliquid.helpers:obliquid-helpers]
is not a dependency of the project. ->
[Help 1]
If I try to use the groupId and artifactId of the JAR included by org.obliquid.helpers:
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-servlet_3.0_spec</artifactId>)
I have the same error.
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-war-plugin:2.1.1:war
(default-war) on project test-webapp:
overlay [ id
org.apache.geronimo.specs:geronimo-servlet_3.0_spec]
is not a dependency of the project. ->
[Help 1]
Reading the War plugin documentation, I found a section about creating skinny WARs. So I tried the following:
<build>
<finalName>private</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<packagingExcludes>WEB-INF/lib/geronimo-servlet_3.0_spec-1.0.jar</packagingExcludes>
</configuration>
</plugin>
</plugins>
</build>
Still without any success, geronimo-servlet_3.0_spec-1.0.jar is still there!
<groupId>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war (default-war) on project test-webapp: overlay [ id org.obliquid.helpers:obliquid-helpers] is not a dependency of the project. -> [Help 1]
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-servlet_3.0_spec</artifactId>
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war (default-war) on project test-webapp: overlay [ id org.apache.geronimo.specs:geronimo-servlet_3.0_spec] is not a dependency of the project. -> [Help 1]
UPDATE 4: I discovered that the target/private.war file is not a zip of target/private/ directory, but the exclusions are done at packaging time and not by deleting files in target/private/ -- This means, I've to re-test all the things I did before.
Suggestion of gouki: doesn't work, the JAR is still there also in the WAR file.
Suggestion of Stephen C., maybe mis-understood: actually I just noticed that the pom.xml is always invalid whatever groupId/artifactId I put of the three possibilities explained above. So they didn't work for me.
What I found in the documentation (packagingExcludes), works.
Now, if I had to choose one of he answers I would choose Stephen C., because he helped me pointing at the documentation of the WAR plugin (I was reading in the wrong places). However I'd accept an answer that doesn't work, at least in the way I tried (probably wrong). So I'm not going to accept any answer, and add a new answer myself with the final working configuration.
UPDATE 5: I post the relevant part of the pom.xml of obliquid-helpers, that mentions geronimo-servlet_3.0_spec. I've marked it optional and with scope provided, still it gets included by a web-app, unless I mark it as "packagingExclude" in the maven-war-plugin configuration.
<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>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
<version>0.9-SNAPSHOT</version>
<packaging>jar</packaging>
<name>obliquid-helpers</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
[...]
</repositories>
<dependencies>
[...]
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-servlet_3.0_spec</artifactId>
<version>1.0</version>
<scope>provided</scope>
<optional>true</optional>
</dependency>
</dependencies>
</project>

Clearly, something has a dependency on that JAR file. If it is not showing up in the dependency tree, perhaps it is due to a dependency of your webapp WAR file on another WAR file that has this dependency.
If that is the case, then you could get add an <excludes> to the <overlay> element of the build descriptor for the WAR file plugin; e.g.
...
<build>
<finalName>webapp</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1</version>
<configuration>
<overlays>
<overlay>
<groupId>xxx</groupId>
<artifactId>yyy</artifactId>
<excludes>
<exclude>WEB-INF/lib/whatever.jar</exclude>
</excludes>
</overlay>
</overlays>
</configuration>
</plugin>
</plugins>
</build>
...
If you are using WAR file overlays, you should always include the clean target in the build. Otherwise you can get old dependencies hanging around in the WAR file. (IIRC, there is a Warning in the Maven output each time you build an overlaid WAR without cleaning!)
In fact, this could be the root cause of your problems. For instance, if previously you had the "geronimo" as an ordinary dependency and you haven't run mvn clean since then, the JAR file could still be hanging around.

Based from your pom.xml, the only dependency that might have dependency on geronimo servlet is
<dependency>
<groupId>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
<version>0.9-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
Can you try excluding the geronimo in this dependency?
<dependency>
<groupId>org.obliquid.helpers</groupId>
<artifactId>obliquid-helpers</artifactId>
<version>0.9-SNAPSHOT</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-servlet_3.0_spec</artifactId>
</exclusion>
</exclusions>
</dependency>

First I want to thank gouki and Stephen C. for helping me. However their proposed solution didn't work for me. I'm grateful to them, but I can't accept their answer, because it would be misleading since it didn't work for this problem. I've upvoted Stephen C. answer, because he pointed me to the right documentation, which was essential to solve the problem.
Reading the WAR plugin documentation, especially the war:war mojo section, I've found an example on how to create Skinny WARs, which did the trick. So here is below the working configuration, to be added to the build section:
<build>
<finalName>private</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<packagingExcludes>WEB-INF/lib/geronimo-servlet_3.0_spec-1.0.jar</packagingExcludes>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
The archive part is probably not really needed, but I will find out when I deploy the WAR. The part that does the trick is the packagingExcludes tag, that can contain a comma separated list of tokens to exclude from the WAR before packaging.