I am developing an eclipse application as a plugin project. I am able to export it as .product file and I am able to run it outside eclipse. Now, I have a requirement to schedule tasks in my plugin project. So, I have to make my project as JAR file and use that in scheduling. Since Plugin projects do not contain any Main methods, how to convert it to a Runnable JAR File?
I believe you would need main method to make it as runnable java project, please find the instructions below link
https://support.smartbear.com/alertsite/docs/monitors/web/selenium/export-eclipse-java-project-as-runnable-jar.html
I'm learning Hadoop under VMware now.(win7, 64) Due to some reason, I can't convert a .java file to .jar file under virtual machine, so I tried to create .jar file under Eclipse.
I'm currently using Eclipse MARS(4.5.1). I need to download something about fat jar, but I can't find it online.
My colleague copied his Eclipse software to me. It is already installed, so I copied the whole package. It is Eclipse Kepler. So I am running two Eclipse software on my computer now. will this cause some problem? (I saved projects seperately)
I can do the convert .jar file thing correctly on Eclipse Kepler now. But I still want to use MARS and delete the extra Eclipse.
thank you !
What you're looking for is the "Fat JAR" eclipse plugin.
Fat jar is a jar which contains all the classes used by the project including their referenced dependencies.
The plugin can enable the creation of such a jar.
In your case, however, Eclipse "Mars" & Eclipse "Kepler" include this functionality. The trick is to get to it...
Here's what you do in order to export a Fat JAR:
Right-click on the required Project and select "Export..." --> "Runnable JAR file".
Select the option which extracts libraries and specify the destination JAR file.
Launch configuration is used to execute this JAR with a predefined "Main" class (this is the "Runnable" part...) using "java -jar file.jar".
If you don't plan to - it won't matter.
(Optional) You can also "Save as ANT script" which, well..., generates XML ant script as well.
select project
select Export
Expand the Java node and select JAR file. Click Next
In the JAR File Specification page, select the resources that you want to export in the Select the resources to export field
.
Select the appropriate checkbox to specify whether you want to Export generated class files and resources or Export Java source
or go to http://www.codejava.net/ides/eclipse/how-to-create-jar-file-in-eclipse
My project is using some jars which are dependent on the external jar httpclient-4.2.3.
In eclipse my project is running smoothly.
But when I am creating a Jar of my project it is showing error.
I found the error that it is picking httpclient from mahout jars which is an older version.
I know we can control classpath ordering of external jars through order and export in eclipse but it is not working properly.
Can someone tell me how I can force eclipse to prioritize some jars over another when I am creating jar of my projectc.
I m doing an eclipse plugin project to create an IDE. I need to create a jar file for the plugin project in which i have four plugin packages which was created by me. Now I need these to be created as a single jar file and the user should be able to download the jar file and run my plugin project without the eclipse software.
EDIT-
You cannot run Eclipse plugin outside of Eclipse, because you need the Equinox runtime container. you could run a plugin using the eclipse executable, and as an application, see:
http://wiki.eclipse.org/FAQ_How_do_I_create_an_application%3F
You're effectively creating an an org.eclipse.core.runtime.applications extension point.
You could also publish a plugin as part of an Eclipse application and then export it as an executable so that it can be run aside from Eclipse. This still bundles the Equinox runtime and plugin together though.
Also, check out "Running it outside of Eclipse" section here.
-END of EDIT
Generally, all you need to run an executable jar file is the jvm (java) and your code with all the classpath dependencies. You can use "Runnable Jar Export Wizard" available in Eclipse IDE when you right-click your project.
You can put all the dependencies inside your jar (for example you can create a lib directory in your project and put all your dependency jars inside). Also you will need to specify the dependecy location in the MANIFEST file that will be generated for your executable jar (if you use the wizard the MANIFEST file will contain your dependencies).
To run your executable jar you will need to execute:
java -jar jar-file
Good Luck!
I use eclipse for Google Android development.
I've created a library project ([x] Is Library in the Android-settings), which includes an external jar-file (Referenced Libraries). This library project are referenced in another Project (the actual project which will use the library project). This is done by add the project under the Android-settings.
the source compiles but if I want to execute it on the device, I get the NoClassDefFoundError for a class which is inside the jar-file which is included in the library project.
Edit: The jar-file ist added to the exported entries ([x] my.jar on the Order and Export-Tab from the library project)
Is there a clean way to get this working?
It has been clearly stated in offcial API here:
A library project can include a JAR library
You can develop a library project that itself includes a JAR library, however you need to manually edit the dependent application project's build path and add a path to the JAR file
The jar lib must be manually added to the dependent application project's build path, not only the library project build path itself.
Update from SDK r17:
This is automatically handled by ADT now, check out new feature for ADT 17.0.0 release here:
Added feature to automatically setup JAR dependencies. Any .jar files in the /libs folder are added to the build configuration (similar to how the Ant build system works). Also, .jar files needed by library projects are also automatically added to projects that depend on those library projects. (more info)
For those who followed the steps(even check the projects in "Order and Export") and still have the java.lang.ClassNotFoundException in the API 17, the final step is to check that your compiler does not run with Java 1.7. If is 1.7 then you should change it to 1.6 for all your projects. After that it will ask to rebuild all the projects and successfully ran on my phone :)
To change the java compile version in eclipse, this is located in: Project properties > Java Compiler > Compiler Compliance level: 1.6
Go to project properties -> build path-> libraies
If you see your jar files like this
snmp4j.jar - e:\software\jars
Its may your problem
Add libs folder in your project and copy jar file in that folder. Right click jar file and go build path -> add to build path. Then you can see your jar as
snmp4j.jar - project_name/libs
Its worked for me.
I had two projects using the same library: one working, the other one crashing with java.lang.NoClassDefFoundError.
After nothing else helped me, I looked into the file project.properties in the root directory of my project.
The working project had the android.library.reference line (the last line below), the crashing one did not:
# Project target.
target=android-17
android.library.reference.1=../my-library-project
I manually added the line and it started working!
(Yes, I did try both (project) properties -- java build path -- projects and (project) properties -- java build path -- order and exports -- nothing helped.)
PS By the way, "project properties" has also the "project references" tab. No idea if it would work.
I had a minor issue when I upgraded to ADT17 where my libs weren't being imported properly. Turns out this is because my librarys were being linked as dependancies from my lib folder not libs!
Seems librarys have to be in the libs folder from now
I had a similar problem and non of the solutions out here fixed it.
Short version: the JAR was compiled in Java 1.7 and could not be found by Dalvik.
We build an internal JAR that we share across backend and mobile clients with Maven. The problem ended up being that the JAR was compiled with Java 1.7. Androids dalvik only supports Java 1.5 and 1.6. This is why everything works fine in Eclipse as it's not compiled to dalvik at this point.
We even specified the target and source version in the Maven compiler plugin to compile with Java 1.6. This did not work because only JDK 1.7 was installed on the build machine. A small note at the bottom of the Maven page gave us the hint: Note: Merely setting the target option does not guarantee that your code actually runs on a JRE with the specified version.
To see if you have this problem as well, rename your *.jar file to *.zip unpack it, and look in the MANIFEST.MF file for the Build-Jdk: parameter to see what Java version actually compiled your JAR.
Another thing to pay attention to is library package names.
If you are using ADT21 and you happen to have libraries that have the same package name, there will be error during compile but it will still compile and run in Eclipse, giving you an APK that is missing some of the resource classes. Hence the crash when you run the app.
If you compile it with ANT then you can see the compile error that says two or more libraries use the same package name.
To fix this, rename your library project by using Android Tools -> Rename Application Package. Then everything will go back to normal.
It took me almost entire day to figure this out...