How to shud down pc using java coading ?

Answer 1

Linux, Mac OS
String sd = "shutdown -h now";

Windows
String sd = "shutdown.exe -s -t 0";

Runtime.getRuntime().exec(sd);
System.exit(0);

Answer 2

I'd go for Tashi N solution but I'd also like to point you at the Java Robot class that you may find inspirational in a similar context