Develop Reference

java.lang.NoSuchMethodError: com.google.gson.Gson.newBuilder()Lcom/google/gson/GsonBuilder;

I'm trying to use Unirest in my program but I keep getting this error java.lang.NoSuchMethodError: com.google.gson.Gson.newBuilder()Lcom/google/gson/GsonBuilder;
I have tried using different maven versions of Gson but I still continue to get this seror
Edid added my pom.xml, I tried deleted my .m2 but I am still having this problem
<dependencies>
<!-- https://mvnrepository.com/artifact/com.konghq/unirest-java -->
<dependency>
<groupId>com.konghq</groupId>
<artifactId>unirest-java</artifactId>
<version>3.7.00</version>
<classifier>standalone</classifier>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>[4.0,)</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.spigotmc</groupId>
<artifactId>Spigot8</artifactId>
<version>1.8</version>
<scope>system</scope>
<systemPath>${project.basedir}/libs/spigot-1.8.8-R0.1-SNAPSHOT-latest.jar</systemPath>
</dependency>
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongodb-driver</artifactId>
<version>LATEST</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>compile</scope>
</dependency>
</dependencies>```

Could be a conflict between the GSON versions in your POM file versus what is in your container (Tomcat/JBoss) etc. Inspect the JARS in WEB-INF/lib. If there are two different versions, then delete the one which is not the same as the one currently in your maven project's POM file. I had a similar issue - my project was using gson-2.6.3.jar but a conflicting gson-2.1.jar also existed in WEB-INF/lib. I deleted gson-2.1.jar and this resolved my problem

This issue is possibly due to conflicts in Gson versions.
Go to your repository if you are on windows:
C:\Users\User_name.m2\repository\com\google\code\gson
or on Mac:-
/.m2/repository/com/google/code/gson
Delete all the existing folders.
Now, add below maven dependency in your pom file:
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.6</version>
</dependency>
Re-build your maven project and try to run.

It seems like a dependencies issue.
Please make sure your dependencies are correct. Unirest 3.7.00 uses Gson 2.8.6
https://mvnrepository.com/artifact/com.konghq/unirest-java/3.7.00
Also, if you don't use Gson separately you don't need to specify it. Just add a dependency for unirest-java as it's described in Maven repository:
<dependency>
<groupId>com.konghq</groupId>
<artifactId>unirest-java</artifactId>
<version>3.7.00</version>
</dependency>

Maven in Eclipse project: package javax.ws.rs does not exist

In Eclipse, when I go to myProject -> right click -> Run As -> Maven build, I am getting multiple errors in the console outlining that certain packages does not exist, like:
javax.ws.rs does not exist
javax.ws.rs.core does not exist
javax.servlet does not exist
javax.servlet.http doest not exist
Although in my pom.xml, I have provided those dependencies:
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs</artifactId>
<version>1.0</version>
</dependency>
etc
under
<dependencyManagement><dependecies>
tags (don't have any errors in pom.xml).
I do also have proxy settings configured in settings.xml file, and this file is properly linked.
I've also got these jars included locally to WebContent\WEB-INF\lib folder and added to the classpath (I can run my REST service on tomcat, the error "package does not exist" appears only when I am trying to use Maven build".
The reason I need that I want to generate and deploy a .war file.
How I can solve this? Is there a war to force Maven look in local libraries instead?

If you have:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
</dependencyManagement>
then you need to have a separate:
<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs</artifactId>
</dependency>
</dependencies>
section.
Typically you would define dependencyManagement in a parent pom.xml file and then use the second dependencies fragment in child pom.xml files. This ensures that all your modules depend upon the same consistent artifacts.

How to fix com.oracle:ojdbc14:jar:10.2.0.1.0

How can I solve the Maven error ?
Missing artifact com.oracle:ojdbc14:jar:10.2.0.1.0
I tried to add another dependency hibernate-entitymanager but it does not work.

<!-- https://mvnrepository.com/artifact/oracle/ojdbc14 -->
<dependency>
<groupId>oracle</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.1.0</version>
</dependency>

You cannot use oracle dependency in your Pom file if you are running your application on server , You need to add jdbc jar file to any folder in your project , And define in your pom.xml
<dependency>
<groupId>oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3</version>
<scope>system</scope>
<systemPath>${basedir}/lib/ojdbc6-11.2.0.3.jar</systemPath>
</dependency>

building maven project when adding dependency on parent jar

Hi guys wondering if you can let me know where I am going wrong.
In my pom.xml I added a dependency for org.powermock:powermock-mockito-release-full:jar:1.5.4
via the following:
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-mockito-release-full</artifactId>
<version>1.5.4</version>
<scope>test</scope>
</dependency>
Now during a build I get the error "Could not resolve dependencies for project com.law:test_pro:jar:0.0.1-SNAPSHOT: The following artifacts could not be resolved: org.powermock:powermock-mockito-release-full:jar:1.5.4"
In my local repository I have all jars for containing sub-projects but no jar for the parent jar which the build process seems to be looking for.

There is only a parent pom file available for the Maven co-ordinate
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-mockito-release-full</artifactId>
<version>1.5.4</version>
<scope>test</scope>
</dependency>
Hence, you need to add the type 'pom' to this like so:
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-mockito-release-full</artifactId>
<version>1.5.4</version>
<scope>test</scope>
<type>pom</type>
</dependency>

Missing jar from repo1.maven.org

Eclipse is unable to find and download the following jar:
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcomponents-client</artifactId>
<version>4.1.2</version>
<packaging>pom</packaging>
</dependency>
http://search.maven.org/#artifactdetails|org.apache.httpcomponents|httpclient|4.1.2|jar
http://repo1.maven.org/maven2/org/apache/httpcomponents/httpcomponents-client/4.1.2/httpcomponents-client-4.1.2.jar
Resolved: I dunno where the pom came from.
Is missing.

It's not missing.
That's a pom (Project Object Model) file.
You probably want the httpclient jar. The pom describes the total project (multiple jar files).
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.1.2</version>
</dependency>