Just downloaded apache commons math 3.3.2 zip (source as opposed to binary) and extracted it. I want to add the jar to classpath in eclipse, but I can't find any file that looks right- only jar is called test. maybe that's it but I was expecting something more like math.commons.3.3.2.jar.
the jar needed is in the binary (rather than source) download
In eclipse, right click your project in the explorer. Click properties, and in the left column click "Javadoc location". Enter the URL "http://commons.apache.org/proper/commons-math/" then it should add all the packages & jars to your project, allowing you to import and reference them with
org.apache.commons.math.(whichever package you would like);
Related
We have been trying to create JAR files from the LanguageTool (LT) Desktop version we downloaded that contains various JAR files. LT at this link made the statement that we needed all the files in these folders libs org and META-INF in our project. LT has repied they have no experience with Netbeans or JavaFX.
LT Directions
The app was built on Windows 7 with Netbeans 8.2 as a JavaFX 8 and Maven JDK 1.8
We tried following this tutorial the author was not much for proper code formatting and failed to mention that LT is not thread safe. We seldom work with threads but think our code is correct?
TUTORIAL
To install the Class AmericanEnglish.class which is in the LT Desktop zip file we extracted we used this process
cd C:\Users\Me\Documents\A A A A A LT UnZip\LanguageTool-4.7\LanguageTool-4.7
jar cf languagesLIBS.jar libs/*
jar cf languagesORG.jar org/*
jar cf languagesMETA.jar META-INF/*
Here is where it gets odd to our limited knowledge of adding Dependencies to Netbeans
1. Open the Projects tab.
2. Right-click on Dependencies.
3. Select Add dependency.
4. Set groupId to: language(can be anything)
5. Set artifactId to: en (can be anything)
6. Set version to: 4.7(can be anything)
7. Click Add to continue.
Dependency is added to pom.xml and appears under the Libraries node of Maven project. Continue:
1. Expand Dependencies.
2. Right-click on library (e.g., group.id).
3. Select Manually install artifact.
4. Set Artifact to install with the Java Archive (.jar) file path.
5. Click Install locally.
This process did place the AmericanEnglish.class in a JAR and it is found by Netbeans
import org.languagetool.JLanguageTool;
import org.languagetool.language.AmericanEnglish;
import org.languagetool.rules.RuleMatch;
Here is the error when we try to populate the JLanguageTool with AmericanEnglish
While the error NoClassDefFoundError would seem to indicate that the app can not find the
AmericanEnglish.class and that is the cause of the error ClassNotFoundException
Our question obviously is how do we fix this ?
And are we crating the external JAR files correctly?
Exception in thread "Thread-4" java.lang.NoClassDefFoundError: com/google/common/cache/CacheLoader
at com.mycompany.maventest.CheckSpellController.lambda$ini$0(CheckSpellController.java:43)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.google.common.cache.CacheLoader
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
We also see these warnings when we Clean and Build the project
The POM for languagetool:LIBS:jar:4.7 is missing, no dependency information available
The POM for languagetool:ORG:jar:4.7 is missing, no dependency information available
The POM for languagetool:META:jar:4.7 is missing, no dependency information available
exec-maven-plugin:1.2.1:exec (unpack-dependencies) # mavenTEST
When the Clean and Build is run we see the dependencies unpack
Here is the few lines of code that cause the error
static JLanguageTool langTool;
public void ini(){
new Thread(() -> {
langTool = new JLanguageTool(new AmericanEnglish());
}).start();
}
The ini() method is called from the initialize method
The necessary JAR files are in the Dependencies folder
The project imports these files
You need to use the actual JAR and the process where you thought it was a bit ODD
Is not the correct way to add JAR files. The extracted ZIP folder has all the gold or should we say JAR's. Here are a few screen shots and directions. That said we are still getting the NoClassDefFoundError so we will work on fixing that part of the question
Delete the three JAR's you added LIBS-4.7.jar META-4.7.jar and ORG-4.7.jar
We would also suggest opening the .m2 folder and under /repository/org/languagetool delete the languagetool folder. Do NOT worry everything will get recreated.
Right Click Dependencies folder and select Add Dependency
In the Query text field enter "org.languagetool"
Here is a comment we did not find languagetool 4.7 JAR's as central only local ? ?
You might like to try and use the central 4.6 JAR's
Expand the org.languagetool:languagetool-core folder and select the 4.7.jar
Once that JAR is in the Dependency folder Right Click ad select Copy Location
Now Right Click the same JAR once more and select Manually Install Artifact
In the Artifact To Install text box paste with a Ctrl + V
This will take you to the location of the JAR select it and presto magic the Artifact is added
Notice the language-en-4.7 we created this JAR file because we could not find AmericanEnglish.class in any of the downloaded files. See Last screen shot
Here are the screen shots in the order to match the above direction
I am not holding my breath that using the downloaded 4.7 JAR,s is the best idea
You might try reaching out to Maven and Language Tool and ask why LT 4.7 is not in the repository!
Best of Luck
How can i add external jars to my project before exporting the project so that the person about to use my code need not have to download those jars.He simply has to refer the jar i provided to run my project(Not using Maven).
Thanks
You might want to create a zip file containing
your_jar.jar
the libraries needed in a subdirectory lib
and add a manifest-classpath entry to point to those libraries
Manifest-Version: 1.0
Created-By: Hand
Main-Class: com.bitplan.gen.parser.m2java
Class-Path: lib/com.bitplan.smartgenerator-4.2.3.jar
After unzipping your code can be started with java -jar your_jar.jar
Here's the deal, I've compiled a few classes into a jar file with a manifest pointing to the main-class. It works just fine on my computer.
I transferred the jar file onto another computer which I'm supposed to give a demonstration tomorrow on and well, here's where things went downhill.
Winrar was not installed, so I installed it in order to extract the folder I had my jar file in. I unknowingly associated winrar with jars which I fixed by changing the default open program with jre7/bin/java.exe. However, the jar file does not self-execute as it did previously. I'm thinking something's up with the registry.
Stackoverflow, what do you think?
I guess a simple solution would be reinstalling the JRE.
You need to reset file association for ".jar" files, jar files are not executed by "jre7/bin/java.exe". so what you should have done before choosing default program to "jre7/bin/java.exe" was to simply uninstall WinRAR or remove its association from the WinRAR settings. So now, open start menu, search and open regedit.exe goto HKEY_CLASSES_ROOT/.jar and delete every value excluding "(Default)" who's value data should be "jarfile". the reinstall jre and reboot pc . THAT'S YOUR SOLUTION.
Trying to install http://www.dotlesscss.org/ to my project and I'm a bit stuck on step 2
Include our reference to your web project
where do I put these files and how do I include this "reference"?
Right click on the References in the solution explorer and select Add Reference...:
then in the Add Reference dialog select the Browse tab and point to the location of the dotless.Core.dll assembly which you extracted from the .zip file you downloaded in step 1.
I have a bunch of JAR files (from a maven2 project) and maven reports some package could not be found (org.openanzo.client.jena to be exact). I want to dig into the JAR files downloaded as the result of maven dependency resolution and find what packages are thus available from these JAR files. Insights?
UPDATE: Apparently, the only good solution to inspect insides of a jar file is the "jar" utility or one can use the facilities of their IDE to do so.
jar tvf filename.jar will show you the contents of a jar file without requiring you to extract it.
But I think that maybe what you are really trying to do is find the right coordinates for the dependency that you are missing, since obviously none of the ones you have right now are supplying the package you are looking for (in other words, checking their contents is not likely to help you).
I confess that the first place I would suggest to check is Sonatype's public Nexus instance. A search for your example turns up nothing, though. Usually that means the project is not trying to get their stuff into Maven Central or other major repositories (which is okay), so you have to resort to a web search. Usually the first two sections of the package tell you where to look (openanzo.org in your case).
If you are on Linux or a Mac, you could go to the terminal at the root of the folder containing your JARs and type:
# grep -ri "org.openanzo.client.jena" *
It will return a recursive list of all JAR files that contain that package name. If it returns 0 results, then none of those JARS contain that package.
If you wanted to do a more exhaustive search, you could unJAR the JAR files. The directory structure and .class files will be organized by packages in folders.
# jar xvf filename.jar
If you are on Windows, you can unJAR a JAR file using a tool such as 7Zip.
#Carsten
you do not have to rename a .jar file to .zip. You can directly open the jar file in winzip/or other zip utility (assuming windows OS)
#ashy_32bit
try using "jar class finder" eclipse plugin from IBM. Simple plugin for finding classes (if you know the class name)
OR
as carsten suggested... set the jar files as lib files and manually look it up
OR
create a batch file called a.bat (where you have all your jar files directly under a single folder) and paste the following 4 lines
#ECHO OFF
dir /b *.jar > allJarFilesList.txt
FOR /F %%A IN (allJarFilesList.txt) DO jar -tf %%A > list_of_packages.txt
FOR %%B IN (list_of_packages.txt) DO FIND /I "com/sun" %%B
NOTE the "com/sun" in the last line.. it is hard coded, you can pass as argument as well...
I know this is very basic form and can be improved "a lot" like looking up in various sub directories.
hope this helps :-)
.jar files are just ZIP compressed archives, rename it to zip, open it with your favourite unzip programm, and traverse through the directory.
If you add the jar file to a eclipse project, you can traverse through the lib in th project explorer.
HTH
Assuming maven downloaded the jar files,the files will be loaded in to a local repository.
You could use maven browser that comes packaged with Eclipse to browse and search for artifacts in your repository.(usually in userdir/.m2/repository)
Note:You can explore your repository directly if you want. You will understand the packages that were downloaded. But I suggest using the plugin.
If you are using Intellij IDEA, each project contains a tree called External Library that allows you to search and explore your libraries.