I am done with the project which connects to database (MySQL). Now I want to export the project as jar. But I don't know how to include its external dependencies? Is there any way of doing it in Eclipse or should I use any scripts for that?.
When you export your project as a 'Runnable jar' (Right mouse on project -> Export -> Runnable jar) you have the option to package all dependencies into the generated jar. It also has two other ways (see screenshot) to export your libraries, be aware of the licences when deciding which packaging method you will use.
The 'launch configuration' dropdown is populated with classes containing a main(String[]) method. The selected class is started when you 'run' the jar.
Exporting as a runnable jar uses the dependencies on your build path (Right mouse on project -> Build Path -> Configure Build Path...). When you export as a 'regular' (non-runnable) jar you can select any file in your project(s). If you have the libraries in your project folder you can include them but external dependencies, for example maven, cannot be included (for maven projects, search here).
You could use the Export->Java->Runnable Jar to create a jar that includes its dependencies
Alternatively, you could use the fatjar eclipse plugin as well to bundle jars together
You can right-click on the project, click on export, type 'jar', choose 'Runnable JAR File Export'. There you have the option 'Extract required libraries into generated JAR'.
Personally,
None of the answers above worked for me, I still kept getting NoClassDefFound errors (I am using Maven for dependencies). My solution was to build using "mvn clean install" and use the "[project]-jar-with-dependencies.jar" that that command creates. Similarly in Eclipse you can right click the project -> Run As -> Maven Install and it will place the jars in the target folder.
If you want to export all JAR-files of a Java web-project, open the latest generated WAR-file with a ZIP-tool (e.g. 7-Zip), navigate to the /WEB-INF/lib/ folder. Here you will find all JAR-files you need for this project (as listed in "Referenced Libraries").
While exporting your source into a jar, make sure you select runnable jar option from the options. Then select if you want to package all the dependency jars or just include them directly in the jar file. It depends on the project that you are working on.
You then run the jar directly by java -jar example.jar.
To generate jar file in eclipse right click on the project for which you want to generate, Select Export>Java>Runnable Jar File,
Its create jar which includes all the dependencies from Pom.xml, But please make sure license issue if you are using third-party dependency for your application.
If it is a standalone (Main method) java project then Not any specific path put all the jars inside the project not any specific path then right click on the project - > export - > Runnable jar --> Select the lunch configuration and Library handeling then choose the radio button option "Package required libraries into generated jar" -- > Finish.
Or
If you have a web project then put all the jars in web-inf/lib folder and do the same step.
Before exporting, click on Buildpath and configure java buildpath and add external jars inside the library. Then try to export as a runnable jar.
Related
I have have a java project in eclipse that uses a bunch of jars.I want to export the class as a runnable jar.When i export the project with jar libraries extracted in the jar it gives me an error when running the jar.
(UncaughtExceptionHandler in thread "main")
However when i exract the libraries as a subfolder besides the runnable jar it works fine.
How can i make the project work the the libraries used extracted in the jar and not in a subfolder?
Thank you
Eclipse has an option to package required library's into the generated JAR. If that is selection that should fix your problem.
Correct option
If I understand you correctly, you're having trouble to export your program as a Jar file including the dependencies libraries.
So, the solution is like this:
When you export your project as a 'Runnable jar' (Right mouse on project -> Export -> Runnable jar) you have the option to package all dependencies into the generated jar. It also has two other ways (see screenshot) to export your libraries, be aware of the licences when deciding which packaging method you will use.
launch configuration dropdown is populated with classes containing a public static void main(String[] args) method. The selected class is started when you run the jar.
Exporting as a runnable jar uses the dependencies on your build path (Right mouse on project -> Build Path -> Configure Build Path...). When you export as a 'regular' (non-runnable) jar you can select any file in your project.
If you have the libraries in your project folder you can include them but external dependencies, for example maven, cannot be included.
Also, there another solution using Gradle, which is much easier and robust, which you can manage all your dependencies so easyly and do so much more.
You can read more here.
I am a novice and don't have much idea. So I have a library that is built with Maven and I want to include this library in my java project in Eclipse, how do I do this? I am using Eclipse juno on MacOSx. I want to run one of the modules in this library, so the source code is provided for this module but how do i run this?
If you are not using maven, you have to download the jar and the sources of that jar (In your case, you can download the zip file provided on the website you mention : http://code.google.com/p/cleartk/downloads/list ) and put it somewhere on your computer.
Then you have to set the build path of your project in Eclipse :
Right-click on your project -> Properties -> Java Build Path
Then you can click on the Libraries tab and Add External Jars so you can point to the jar you downloaded.
In this tab, you can attach the sources of this jar to have access to the source code in Eclipse (and eventually set breakpoint).
I am developing an eclipse plugin. It has other plugin/feature dependencies. However I want to add my own favorite JAR/libriaries to it, like say logback for example. How can I do this so that when I eventually deploy it to an update site, it will have these jars on the classpath?
Also, I am currently using eclipse to run the plugin (it opens another instance of eclipse) to run this. This will also need to have the jar on the classpath.
You can try these steps :-
Use Import>File System to import the jar files into your plugin project, say in the /lib directory.
Use "Add..." to add the jars to the classpath section of the plugin.xml>Runtime tab.
Use "New..." to add "." library back (with no quotes, of course).
make sure your binary build exports the new jar files on the plugin.xml>Build tab.
save.
on the project, use context menu>PDE Tools>Update Classpath to correctly add the jars to the eclipse project classpath.
In plugin-manifest editor select Runtime tab and add you jar in classpath section.
I have a project A (for example an Ant based Java Application project) and a second project B (a Java Class Library project or another Java Application project, both Ant build based.)
Project B has some additional Java library dependencies (.jar files in the Libraries folder).
A depends on B. A can use classes which are written by myself in B but it can not see classes in the additional libraries of B unless I add those libraries/jar files to A.
Is there a way to get NetBeans to automatically manage the library dependencies in A by including the dependencies of B in addition to B's own jar file? In eclipse when you add .jar files to project B, it is not necessary to add them to A again.
Thanks.
In your project folder you should see a folder called Dependencies, right click on that folder and choose Add Dependency.... Open the Open Projects tab; from there you can select your project from the list. Click Add.
This works for NetBeans IDE 7.2.1.
The simpler NetBeans Ant project Libraries folder is used for compile time and run time dependencies of each individual project. If your "Java Class Library" type Ant based project B has additional library dependencies, they are not automatically forwarded or updated in Project A when you include B as a library of A.
When project A is built, it's .jar file will only contain Project A code and the lib/ folder will only include .jar files from it's Libraries folder. This can cause confusion when you upgrade the dependent library versions and possibly forget to upgrade them everywhere you depend on project B.
You will need to manually manage the dependencies unless you switch to a project management and build system that handles this, like Maven.
A NetBeans Maven project will have a Dependencies folder instead of a Libraries folder and if project B is properly setup and registered as a Maven project and project A is also created as a Maven project, you could Add Dependency on B to A and B would forward it's dependency information to Maven project A.
If you want to add another project as a library in netbeans right click on the libraries directory and select "Add Project", select the project you want to add. When you do this the jar file(in the dist dir) that has been built for the project you are adding will be selected and then click the "Add Project jar files" and that should add the jar file to your project. Alternatively you could select "Add Jar" instead and add the jar file yourself the way that Ravi described.
In your project folder you see a folder called Libraries , right click on that folder from there you can select your .jar file. You need not to add .jar files repeatedly after adding once to your project. You just need to Clean and Build your project whenever new files are added to .jar file.
I've a java project that use some external jar library, when i export my project with eclipse (File-Export-Runnable Jar File), i select the option for "copy external libraries into a subfolder next to the main jar" and eclipse automatically create for me a folder named :
myjarname_lib
I want to export the library in a folder named only lib , is it possible ?
I've tried to rename the folder in lib but don't work, because the executable jar don't recognize the library in that folder.
How can i change the name of the external lib ?
Here is a workaround: When you run the Export wizard, there is a checkbox to create an Ant buildfile. Choose a location for the buildfile inside your project somewhere, then finish the export. Open the buildfile that was created (you might need to hit "F5" to refresh the project). Then just replace all "myprojectname_lib" with "lib". From then on, use "Run As -> Ant Build" for your exports instead of the Eclipse built-in.
The drawbacks are that this buildfile is completely independent of your project and it seems to manage copying each dependency individually. If you change the dependencies of your project, you will have to manually update this file to get the correct exports.