I started a project for a Minecraft plugin on Eclipse, i need to build a path, for the spigot jar file. When I did my first project, there was an option called "Add External Archives" that option doesn't show up for me anymore. It only says "Configure Build Path", I need help, I have been trying all day.
In Eclipse right click your project, click "Build Path" then click "Configure Build Path". Then a window like in the image attached should open.
In this window you click "Add external jar" and navigate to your spigot server jar. Wen you have selected the jar file, you click "Apply and close".
In the Eclipse IDE, using the Java Development Tools (JDT), you can add a Java project as a reference for another Java project by configuring the Java Build Path. Go to "Project > Properties > Java Build Path". Under the "Projects" tab, add the referenced project (assuming it is in the same workspace). How can I get projects referenced in this manner to show up in the Project Explorer (or even the Package Explorer or Navigator) view(s)? If, under the "Libraries" tab, you add a JAR or Library, it shows up under the "Referenced Libraries" node. Is it possible to do something similar with projects from the build path?
Thanks.
How do I import a jar in Eclipse?
You can add a jar in Eclipse by right-clicking on the Project → Build Path → Configure Build Path. Under Libraries tab, click Add Jars or Add External JARs and give the Jar. A quick demo here.
The above solution is obviously a "Quick" one. However, if you are working on a project where you need to commit files to the source control repository, I would recommend adding Jar files to a dedicated library folder within your source control repository and referencing few or all of them as mentioned above.
Adding external Jar is not smart in case you want to change the project location in filesystem.
The best way is to add the jar to build path so your project will compile if exported:
Create a folder called lib in your project folder.
copy to this folder all the jar files you need.
Refresh your project in eclipse.
Select all the jar files, then right click on one of them and select Build Path -> Add to Build Path
Two choices:
1/ From the project:
2/ If you have already other jar imported, from the directory "References Libraries":
Both will lead you to this screen where you can mange your libraries:
Here are the steps:
click File > Import. The Import window opens.
Under Select an import source, click J2EE > App Client JAR file.
Click Next.
In the Application Client file field, enter the location and name of the application client JAR file that you want to import. You can click the Browse button to select the JAR file from the file system.
In the Application Client project field, type a new project name or select an application client project from the drop-down list. If you type a new name in this field, the application client project will be created based on the version of the application client JAR file, and it will use the default location.
In the Target runtime drop-down list, select the application server that you want to target for your development. This selection affects the run time settings by modifying the class path entries for the project.
If you want to add the new module to an enterprise application project, select the Add project to an EAR check box and then select an existing enterprise application project from the list or create a new one by clicking New.
Note: If you type a new enterprise application project name, the enterprise application project will be created in the default location with the lowest compatible J2EE version based on the version of the project being created. If you want to specify a different version or a different location for the enterprise application, you must use the New Enterprise Application Project wizard.
Click Finish to import the application client JAR file.
Just a comment on importing jars into Eclipse (plug-in development) projects:
In case you are developing Eclipse plug-ins, it makes sense to use Eclipse's native bundling mechanism instead of just importing the jar into a plug-in project. Eclipse (or better its underlying OSGi runtime, Equinox) uses so-called bundles which contain some more information than plain jars (e.g., version infos, dependencies to other bundles, exported packages; see the MANIFEST.MF file). Because of this information, OSGi bundles can be dynamically loaded/unloaded and there is automatic dependency resolution available in an OSGi/Eclipse runtime. Hence, using OSGi bundles instead of plain jars (contained inside another OSGi bundle) has some advantages.
(BTW: Eclipse plug-ins are the same thing as OSGi bundles.)
There is a good chance that somebody already bundled a certain (3rd party) library as an OSGi bundle. You might want to take a look at the following bundle repositories:
http://www.springsource.com/repository/app/
http://download.eclipse.org/tools/orbit/downloads/
http://www.osgi.org/Repository/HomePage
Eclipse -> Preferences -> Java -> Build Path -> User Libraries -> New(Name it) -> Add external Jars
(I recommend dragging your new libraries into the eclipse folder before any of these steps to keep everything together, that way if you reinstall Eclipse or your OS you won't have to rwlink anything except the JDK) Now select the jar files you want. Click OK.
Right click on your project and choose Build Path -> Add Library
FYI just code and then right click and Source->Organize Imports
Jar File in the system path is:
C:\oraclexe\app\oracle\product\10.2.0\server\jdbc\lib\ojdbc14.jar
ojdbc14.jar(it's jar file)
To import jar file in your Eclipse IDE, follow the steps given below.
Right-click on your project
Select Build Path
Click on Configure Build Path
Click on Libraries, select Modulepath and select Add External JARs
Select the jar file from the required folder
Click and Apply and Ok
first of all you will go to your project what you are created
and next right click in your mouse and select properties in the bottom
and select build in path in the left corner and add external jar file add click apply .that's it
In eclipse I included a compressed jar file i.e. zip file. Eclipse allowed me to add this zip file as an external jar but when I tried to access the classes in the jar they weren't showing up.
After a lot of trial and error I found that using a zip format doesn't work. When I added a jar file then it worked for me.
Right Click on the Project.
Click on Build Path.
Click On Configure Build Path.
Under Libraries, Click on Add Jar or Add External Jar.
If you are having a trouble on udemy course of chad on springboot for the importing the jar. Then follow these steps.
Right click on the project.
You will see a option of Build Path, click on it.
You will have a option of Configure Build path, click on it.
Go to libraries.
Then go to the place where you have a jar files make them into a new folder and upload on a new place.
Then click on Add External Jars, you will surely be able to upload it which will help on classpathxmlapplicationcontext as well.
Thank you.
I added a Java project (containing one default package with 2 classes) to my folder which I declare as my workspace in Eclipse. But when I launch Eclipse, it does not add this project in the package explorer. What can I do to solve this problem?
You can't copy files or folders to your workspace folder, you have to import the project into Eclipse:
From the main menu bar, select command link File > Import.... The Import wizard opens.
Select General > Existing Project into Workspace and click Next.
Choose either Select root directory or Select archive file and click the associated Browse to locate the directory or file containing the projects.
Under Projects select the project or projects which you would like to import.
Click Finish to start the import.
Click with right button on the folder containing sources and select use as source folder
Now that i've been doing some research I understand that I need to be placing my dependent external jars in the web-inf/lib folder for a dynamic web project in eclipse. Unfortunately until now I have simply been importing them in on the build path within eclipse and then again in the runtime config for my testing server.
Is there a simple way to copy all of the dependent jars to the web-inf/lib folder upon export or do I have to manually find each one, and place it in the folder? Is there a better way to manage external jars during development so I don't have to be concerned with importing them to the build path, and then the runtime, and then the library folder? I've tried using Project >> Properties >> Java Build Path >> Order and Export and checking all the jars, but they still don't seem to export with the war.
I am using tomcat as my production server and figured all of this out when I couldn't start the project due to defclassnotfounderror's in the log file.
Right Click on the project -> properties. On properties window
select "Deployment Assembly" on the left hand side
Click "add"
select "Java Build Path Entries".
Select all the required libraries
Right Click on the project -> export. Select Web -> .war file.
You will find the libraries under /WEB-INF/lib
In the future you should always create a copy of your depencies in the web-inf/lib folder.
When they are there just right click them and select "Build Path -> Add to Build Path".
For your current project I would disable all current external jars that live outside of that folder and then copy them into it.