File

```
@Retention(RUNTIME)
@Target({METHOD,FIELD})
public @interface File
```
The File annotation marks a String property as a file such that the String can be changed by a browser.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  String value
  The file extension string.

- Element Detail
  - value
```
String value
```
    The file extension string.
    
    Returns:
    
    the file extension string
    
    Default:
    
    ""