ExternalFileLauncher.OpenExternalFileHandler (BlueJ Extensions API)

Enclosing class:

ExternalFileLauncher
```
public static interface ExternalFileLauncher.OpenExternalFileHandler
```
This interface allows a mechanism for a BlueJ extension to write a launcher, and for BlueJ to call this launcher. When implementing the interface, BlueJ extension writers must take a particular care that their action will not block the BlueJ UI thread (JavaFX thread).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`openFile(java.lang.String filePath)`	The BlueJ extension implements this method as a launcher for a file, specified by its name.

- Method Detail
  - openFile
```
void openFile(java.lang.String filePath)
       throws java.lang.Exception
```
    The BlueJ extension implements this method as a launcher for a file, specified by its name. BlueJ will call it when trying to run the launcher associated with the file extension. Note: particular take must be taken when implementing this method as it could cause BlueJ UI thread (JavaFX thread).
    
    Parameters:
    
    filePath - the file path to launch
    
    Throws:
    
    java.lang.Exception