Check if a user is root in a java application

Question

How can i verify if a user is root in a java application?

Thanks

Answer 1

Process p = Runtime.getRuntime().exec("id -u")

Keep in mind that the "root" user on a system may not be called root (although it's rare to change it), and it's also possible to alias it to another username. If the current user is root-like, the output will be 0.

Answer 2

Easy. Just use

System.getProperty("user.name")