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How to create Eclipse plugins from jars - Tutorial

Lars Vogel

Version 1.2


Converting jars to Eclipse plugins

This article describes how to create Eclipse plugins (OSGi bundles) from standard Java libraries delivered as JAR files. This article is based on Eclipse 4.4.

Table of Contents

1. JAR files without OSGi meta-data
2. Integrating external jars / third party libraries
2.1. Creating a plug-in project for your jar
2.2. Using the new plug-in project
3. About this website
4. Links and Literature
4.1. vogella GmbH training and consulting support

1. JAR files without OSGi meta-data

If a JAR file does not contain the OSGi meta-data in the META-INF/MANIFEST.MF file, it cannot be directly consumed by other Eclipse plug-ins.

If you want to use such standard Java libraries in other Eclipse plug-ins you have to convert them also into a plug-in. After the conversion the resulting JAR file can still be used in a non OSGi runtime, e.g., a Java webserver. The Java runtime ignores the additional OSGi meta-data.

Eclipse provides a wizard to convert a JAR file with OSGi meta-data to a plug-in. The usage of this wizard is demonstrated in Section 2, “Integrating external jars / third party libraries”.


If you repackage a JAR into a plug-in it is wise to check if the license allows this. You should also try to contact the author of the software and ask if he can integrate the OSGi meta-data directly in his library.

2. Integrating external jars / third party libraries

The following gives an example how to convert a standard Java JAR to an Eclipse plug-in.

2.1. Creating a plug-in project for your jar

Create a new plug-in project by selecting FileNewProjectPlug-in DevelopmentPlug-in from Existing JAR Archives.

Add the JAR files you want to have in this new plug-in. Press next.

Enter a name and a version for your new plug-in. Uncheck the Unzip the JAR archive into the project flag. Unchecking this flag prevents that the class files are extracted from the JAR file which is not necessary to use them.

Afterwards press the Finish button in the wizard.

You have created a new plug-in for the selected JAR files. Open the file MANIFEST.MF and validate that all required packages are exported on the tab Runtime. All the packages from your JAR files should be included in the exported packages as OSGi will otherwise prevent other plug-ins from accessing them.

2.2. Using the new plug-in project

In the plug-in project which should access the library, open the MANIFEST.MF file and select the Dependencies tab. Add the new plug-in as dependency.

3. About this website

4. Links and Literature

4.1. vogella GmbH training and consulting support

The vogella company provides comprehensive training and education services from experts in the areas of Eclipse RCP, Android, Git, Java, Gradle and Spring. We offer both public and inhouse training. Whichever course you decide to take, you are guaranteed to experience what many before you refer to as “The best IT class I have ever attended”. The vogella company offers expert consulting services, development support and coaching. Our customers range from Fortune 100 corporations to individual developers.