How Do I Include External Libraries When Exporting a Java Project as a JAR in Eclipse?

Distributing Java Applications with External Libraries in Eclipse

Question: How do I export a Java project as a JAR file in Eclipse while including its external dependencies?

Answer:

Exporting a project as a JAR file with its dependencies allows you to distribute your application easily. In Eclipse, you have the flexibility to include external libraries in your JAR using the following methods:

1. Runnable JAR:

• Right-click on your project and select Export > Runnable JAR.
• In the "Libraries" tab, select the option "Package required libraries into generated JAR".
• This will include all necessary dependencies within your JAR file.

2. Export as a Regular JAR:

• If you have external libraries stored within your project folder, you can include them by manually selecting them in the Export > JAR > Libraries tab.

3. Maven Projects:

• Maven manages dependencies separately. External dependencies for Maven projects cannot be exported directly. You can use Maven commands to package your project into a JAR file with dependencies.

Additional Notes:

• The "launch configuration" dropdown in the Runnable JAR export window allows you to specify the main class that should be run when the JAR is executed.
• The Build Path settings (Right-click on project > Build Path > Configure Build Path...) determine the dependencies used when exporting as a Runnable JAR.
• Be aware of licensing restrictions when deciding how to package your libraries.

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