How to Include External JARs in an Executable JAR using Eclipse?

Packaging External Jars for Executable JAR Creation in Eclipse

When developing Java programs that rely on external JAR files, it becomes crucial to include these dependencies in the executable JAR file to ensure successful execution beyond Eclipse's environment. This question delves into the specifics of integrating external JARs into an executable JAR using Eclipse and addresses common challenges faced during the process.

To resolve the issue described, where the executable JAR lacks the functionality of the external JAR, it is essential to properly package the dependencies. Eclipse 3.5 offers a straightforward solution through its built-in feature for incorporating external libraries into the JAR.

Procedure:

1. Within Eclipse, navigate to the "File" menu and select "Export..."
2. From the list of options, choose "Runnable JAR" and proceed to the next step.
3. In the "Runnable JAR Export" window, locate the "Package required libraries into generated JAR" checkbox.
4. Enable this checkbox to ensure that the external JARs are packaged with the main JAR.
5. Follow the remaining steps and complete the JAR export process.

By implementing these steps, Eclipse will automatically bundle the necessary external JARs into the executable JAR, resolving the issue and ensuring that the program functions properly when executed outside Eclipse.

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