I am trying to use Dataframes in my java project. I found a library on the internet: https://github.com/cardillo/joinery. but I dont know how to add the folder to my directory and use dataframes in my project. please advise. I am new to java.
You can download the jar from here and add it to the Java project's build path.
Or if your project is maven based Java project then add the dependency in pom.xml file
<dependency>
<groupId>joinery</groupId>
<artifactId>joinery-dataframe</artifactId>
<version>1.8</version>
</dependency>
For Gradle Based Java project add in build.gradle:
dependencies{
compile "com.google.guava:guava:$guavaVersion"
}
Related
My pom.xml has only 1 dependency -
<dependency>
<groupId>com.shubham.TestNexus</groupId>
<artifactId>TestNexus</artifactId>
<version>1.0</version>
</dependency>
This is a test jar that I have created and uploaded to my local nexus repository. I could see that when I am building the project, maven is downloading the jar and placing it in the Maven Dependencies directory. I could see the same jar added to the classpath as well.
This jar has nothing but a simple helloWorld printing method.
Now when I am using this jar in my project, it is not allowing me to create the object of the class inside this jar.
And, when I tried making a non-maven java project and added the jar manually to the classpath I am able to create the object of the class. Can anyone please help here.
I found the solution to the problem, seems like it doesn't allow the jars that have classes, present in the default package. I created another jar and put it inside a package and it worked. Thanks a lot everyone.
I work with maven aswell. When i have problems with dependencies to try all this steps:
Use the maven clean and install commands.
Use the maven update project to force it.
Refresh all the project.
If it doesn't work the problem could be on m2 repo.
I want to use the Jdom package to use .XML files for my application.
I have downloaded the Jdom's build 2.0.6.
But now, I don't know how to install it.
If someone can guide me..
(I'm on macOs)
If you downloaded JDOM jar file, then simply include it to your java project in IDE.
If you use IntelliJ IDEA, then follow these steps:
File > Project Structure > Libraries > New Project Library > Java
Find your jar file
Add it to your project
If you use Maven, then you can add this code to your pom.xml:
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>2.0.2</version>
</dependency>
You can view all available versions on Maven Central.
If you use Eclipse IDE, then follow these steps :
Right click on your project > Build Path > Configure Build Path > Add external JARs
Select your JAR
Apply and save
I've got to get the HtmlUnit dependencies working by tomorrow to complete a project. I need to use java to access a webpage, fill in a form and click some buttons - HtmlUnit has been recommended for this.
I have downloaded the htmlunit 2.19 bin files which appears to have the jar dependencies and a bunch of documentation on how to use certain features - but there is no 'installation' steps.
Can someone please step me through the installation of the jar dependencies?
I am using Windows 7 and NetBeans IDE 8.0.2.
Thank in advance :)
I fixed the problem. In the libraries menu, I was just adding the folder that contained the jar files. I had to remove that and then add all the jars individually. – Joe
ref: Java: how to setup htmlunit
Right-click my project -> Properties -> Libraries -> Add JAR/Folder
Then add each jar individually.
In the downloaded htmlunit-x.y-bin.zip file, there is a lib folder, which contains all the dependencies.
or you can use maven:
<dependency>
<groupId>net.sourceforge.htmlunit</groupId>
<artifactId>htmlunit</artifactId>
<version>2.19</version>
</dependency>
I wrote a small OpenGL library for private use.
It is based on Lwjgl. I am programming with eclipse.
Now I want to export this library to have one JarFile, which
I can add to the build path of a project and the user can
only use the library and not lwjgl. So I want to keep lwjgl and the
native files in the build path but export it with my library as one jar.
How could I achieve this?
You can consider using maven to help manage your project life cycle. While there are many other tools out there, maven has been one of the more widely used so if you encountered any difficulties, it won't be hard to find solutions.
Maven can be used to build and package your artifacts, and manage your dependencies (in this case lwjgl and other dependencies lwjgl needs). Since you are already using Eclipse, you can easily use it to create a maven project. (Refer this post here for guidance). From there, Eclipse will help to manage all your build/class paths.
Project Structure
After you create your maven project in Eclipse, you will see that under the project root folder, there is at least:
a pom.xml file. Maven uses this file to determine anything and everything about your project including dependencies.
a src/main folder. This is where you will keep all your Java source codes.
a src/test folder. This is where you will keep all your test codes.
Managing Your Dependencies
The next step involves modifying your pom.xml to specify lwjgl as a dependency. To do so, add the following dependency configuration to your pom.xml
<dependency>
<groupId>org.lwjgl.lwjgl</groupId>
<artifactId>lwjgl</artifactId>
<version>2.9.1</version>
</dependency>
Note that this <dependency> configuration should be added to a parent <dependencies> section.
This will download the main lwjgl.jar (version 2.9.1) and the natives for Windows, Linux and Mac OSX from the Maven Central Repository into your project (so you don't have to manage it manually, say in a separate lib folder).
Export Your Project As A JAR
If all went well, you will be able to build your project by navigating to your project root from command line (you can do this in Eclipse too), and issue the command
mvn clean install
which will build your Java codes, execute your unit tests suite (if any), download any dependencies specified in your pom.xml, and generate a JAR file named after your project in the target folder.
To verify, unzip the JAR file and you should be able to find lwjgl.jar along with any other dependencies in one of the folders.
Hope this will get you started.
EDIT:
Building Your Project
If your target folder remains empty after executing mvn clean install, try include this build plugin configuration in your pom.xml:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
</plugin>
</plugins>
</build>
I have installed eclipse ide for EE developers and I am receiving an import error for
import javax.json.Json;
import javax.json.JsonReader;
etc.
I have right clicked on project folder -> clicked properties -> clicked Java build path -> add library -> JRE System Library,
but the dependencies that show up are already imported. How can I import the javax.json package?
If using Maven, add this dependency to your pom.xml
<dependency>
<groupId>javax.json</groupId>
<artifactId>javax.json-api</artifactId>
<version>1.0</version>
</dependency>
For Gradle, add this to your build.gradle
compile 'javax.json:javax.json-api:1.0'
Going to assume that you are not using Java 7 and thus need to add the JAR file directly to your project path:
Here's the link to the
JAR
And where it came from:
http://jsonp.java.net/
Download and add to your project build path.
You need to get a hold of the Jar from https://java.net/projects/jsonp/
Then got to project folder -> clicked properties -> clicked Java build path -> Add External Jars...
From here you can import the downloaded Jar (library) into your project.
Using javax.json group (what is in the accepted version) doesn't work for me. I get this:
javax.json.JsonException: Provider org.glassfish.json.JsonProviderImpl not found
Instead, what does work for me is the following (put this in the dependencies section of build.gradle if you're using Gradle):
implementation "org.glassfish:javax.json:1.1.4"
To find the latest version of the library, see the library's search.maven.org page.
You will have to download the Jar from https://java.net/projects/jsonp/ as they are not yet part of main Java runtime, download the jar and add it to your classpath and it should work
JSR http://jcp.org/en/jsr/detail?id=353