Why Are Files Missing in My Runnable JAR?

Why Runnable JARs Lack Images and Files

When exporting your code as a runnable JAR from Eclipse, you may encounter missing files such as button images. This occurs even if these files are present within the JAR. Using getClass().getResource may not resolve the issue, and the JAR may fail to execute.

Solution

To address this problem, ensure you correctly include the relevant files. Follow these steps:

1. Right-click the project in the Project Explorer Tree.
2. Select "New" > "Source Folder" and create a new folder with any name.
3. Manually copy the necessary files (e.g., images) into the created folder via the file system.
4. Refresh the project in Eclipse by right-clicking it in the Project Explorer.
5. To access a file, such as an image, use:

<code class="java">getClass().getResource("/images/yourImageName.extension");</code>

This will return a URL object. Note the leading forward slash. The contents of the Source Folder will automatically be added to the bin folder during project execution, and they will be accessible when creating a Runnable JAR.

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