How to Fix the \'Location is Required\' Error in JavaFX When Using FXML in the Same Package?

JavaFX "Location is Required" Error in Same Package

An error message of "java.lang.NullPointerException: Location is required" in JavaFX can occur when an FXML file cannot be loaded. This issue may arise even if the FXML file is in the same package as the Application class.

Cause:

In certain cases, such as when Maven is being used, the FXML file may not be correctly located. This can occur due to Maven's resource management mechanism.

Solution:

To resolve this issue, use getClassLoader().getResource() instead of getClass().getResource() to load the FXML file. This modification ensures that the correct location is used to locate the FXML file.

Modified Code:

Replace the following line:

<code class="java">Parent root = FXMLLoader.load(getClass().getResource("main.fxml"));</code>

with the following:

<code class="java">Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("main.fxml"));</code>

By utilizing getClassLoader().getResource(), the issue of the "Location is required" error should be resolved. This revised approach considers Maven's resource management and allows the FXML file to be loaded successfully.

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