Why Does class.getResource() Return Null in IntelliJ IDEA?

class.getResource Null Return

Getting a URL resource through class.getResource() can sometimes result in a null return, despite the expectation of a valid URL. To address this issue, it's necessary to delve into the underlying causes and consider possible resolutions.

As suggested in the provided solution, one potential reason for the null return is a discrepancy between the resource extension and the configured resource patterns. This is particularly relevant for IntelliJ IDEA users.

Within the IntelliJ IDEA settings, navigate to "Settings > Build, Execution, Deployment > Compiler > Resource patterns." Here, you'll find a list of file extensions that IntelliJ recognizes as resources. If the resource extension in question (e.g., ".dat") is not included in this list, class.getResource()` will not be able to locate the resource and return null.

To resolve this issue, add the desired extension to the list of resource patterns. This ensures that IntelliJ recognizes the file as a resource and allows class.getResource() to retrieve the URL successfully.

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