How to Put a Jar in Classpath in Eclipse

How to put a jar in classpath in Eclipse?

As of rev 17 of the Android Developer Tools, the correct way to add a library jar when.using the tools and Eclipse is to create a directory called libs on the same level as your src and assets directories and then drop the jar in there. Nothing else.required, the tools take care of all the rest for you automatically.

Classpath jar files in eclipse

Even if you build path to external JARs you have to import the required classes because they do not actually exist inside the same package you are working at.

How to 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.

Eclipse: Adding all the jars from a folder in java classpath

Instead of using a folder outside of your project, copy all necessary JARs into a lib/ folder inside of your project.

Now you can select all JARs in that folder, right click -> Build Path -> Add To Build Path.

Alternatively, you can define a "User Library" which contains all the JARs and add that single item to your project's build path.

But the best solution IMO, is to use Maven for this. Get the M2E Plugin for Eclipse and convert your project to a Maven project. Now you can use "Add Dependency" to add millions of other project (including everything they need) to your project. Maven will download and manage the dependencies for you.

Cannot add jar files into server classpath in eclipse

In the Argumments tab you can see a check box with label as "ALways update arguments related to the runtime". Make sure that check box is unchecked. Guess that will do it :)

Regards

Ajin

Adding folder to Eclipse classpath

Based on what you've said, I would probably create a user library containing your library JARs.

You can create a User Library with Window => Preferences, drill down to Java => Build Path => User Libraries. => Then choose New, and give your library a name => Then add the JARs you want.

Then you can add all the JARs to the classpath of any project you have by right-clicking on the project => Add Libraries => User Libraries, and selecting your library.

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Update; to have Eclipse dynamically add .jar files you drop into a folder to your project classpath, you need a plugin called Library Folder ClasspathContainer. Follow these instructions and you're in business.

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