Is there a good way to determine if a file is executable in Java

Question

I'm aware you can call

Runtime.getRuntime().exec(file);

and get an exception if it is not executable, however this is unsafe since running an executable can have side effects.

I guess just checking the extension is enough on Windows, but is there a way I can read the executable bit on *nix file systems?

What is the best way to find out if an file is executable in the OS?

Answer 1

See java.io.File.canExecute()

Answer 2

The class java.io.File has method canExecute().

Answer 3

You can use Files class. It has this method static boolean isExecutable(Path path). If you have just a String of path then you can get Path using Paths class. Like this

Path path = Paths.get(pathToFile);