How to include libraries in jar file

Active 8 years, 7 months ago. Viewed 22k times. Ok, so here's what we've got: We've got two library packages, which we've compiled into jars. All nicely into jars for us. Now we want to include these two jars into another java project. JarJar; import barwars. And this compiles and runs fine. Now I have two problems. Firstly - if I move this jar file to somewhere else, and try run it, then I'll get: Exception in thread "main" java.

Is this possible? And is it good practise? You may want to look into how Maven solves this. Add a comment. Active Oldest Votes. Possible, yes. Good practice, no. If possible, how? The screenshot below shows the various popups you will see when adding a new JAR to your routine as a Routine Library.

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Data and Metadata Governance. Administering and Monitoring. Component Development. Employers, Recruiters and Candidates. Feedback and Suggestions. Part 4. Note: It is much better to reference JARs that exist in your project or in other projects - this allows you to check in all of your dependencies to your version control system. Click Add Variable. It's to the right of the project properties window. Click Configure Variables.

It's at the bottom of the New Variables window. Click New. It's at the bottom of the preferences window. Type a name for the new variable. Browse to the directory that contains the JAR for the path.

Click the Folder button and browse to the directory that contains the JAR path. You can also Click File and select a specific jar file for the variable, if you prefer. Click OK. This defines the variables. This closes the preferences dialog. Select the variable from the list. Click the variable to select it. Click Extend. It's the button to the right of the list of variables.

Select the JAR s that you want to add to the classpath. Click to select the JARs. This closes the extend dialog window. This closes the new classpath variable dialog. This closes the build path setup dialog. If you share the project with someone else, they must also define the variable. This displays a pop-up menu to the side. Note: If you use this method, the external JAR will need to be in the same location on the hard drive for anyone who uses this project.

This can make sharing a common project more difficult. Click Add External Archives. It's in the Build Path sub-menu. Select the JARs you want and click Open. Part 5. It's in the pop-up menu that appears when you right-click the project name.

Include your email address to get a message when this question is answered. Whenever you add new files or folders to your projects in Eclipse via anything but Eclipse, you must refresh the affected projects to let Eclipse know that the new files are there. Otherwise, you may run into compiler or build path errors. Helpful 0 Not Helpful 0. Though the internal JARs disappear from lib , they are still there in the file system. It is merely Eclipse's perspective telling you that those JARs have been added.

To be safe, you might want to create a folder in order to document your code. Here's how to do it: Right-click the. JAR in the Reference Libraries in the package explorer. Select the Javadoc tab and type in the folder or URL where the documentation is located. Note: Eclipse will not like this and validation will fail.

But don't worry, it will still work.