Packaging extensions as JAR Files

Once you have created your extensions you can package the .class files into a single Java™ Archive (JAR) file and distribute the file. This means that you can package multiple extensions into one JAR file for distribution.

Before building the JAR file, you must create a manifest that indicates which classes in the JAR file are extensions.

Using your favorite text-editor, create a manifest file for the extensions you wish to package in the JAR file.
- The manifest file has the file extension .mf. For example, the manifest file for FCIExtension is called:
```
      FCI.mf
```
- The first line of the manifest must include the manifest-version number. See the following example for the correct syntax.
- The manifest file is broken down into sections, where each section represents a particular Extension class and its attribute as an extension.
- The class listed in each section of the manifest file is the class that implements the Extension interface. In the following example FCIExtension.class implements FCIExtension.
- For example, the manifest file for FCIExtension will have the following syntax and format (notice that there is a space after every colon)
```
      Manifest-Version: 1.0
      Name: com/yourcompany/samples/FCIExtension.class
      IFS-Extension: True
```
- Ensure that you add a carriage return to the last line of the manifest file. Otherwise the JAR may not work properly.
Create a JAR file from the .class files that make up your extension.
- Use the following syntax to create the JAR file:
```
      jar -cvfm destination.jar manifest.mf YourExtension.class 
         YourFunctionCall.class
```
- Optionally, you can replace the class names with the root folder for your package. This will include all classes that are defined in that package. For example, to create a JAR file called FormIFX for FCIExtension, you would type the following:
```
      jar -cvfm FormIFX.jar FCI.mf com
```