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 # setFileExtension

 Last update: 30.07.2026 

public [setFileExtension](set-file-extension.md)(mIndex: [String](https://docs.oracle.com/javase/8/docs/api/java/lang/String.html), fileExtension: [String](https://docs.oracle.com/javase/8/docs/api/java/lang/String.html))

set file extension of a file member

#### Parameters

mIndexname of the member#### Throws

[ModelCenterException](./../-model-center-exception/index.md)